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899999999999999 = 2999999930000001
BaseRepresentation
bin1100110010100010111001010…
…0010011000011111111111111
311101000122011022102211202120022
43030220232110103003333333
51420431044444444444444
612510050143040442355
7360366566000040233
oct31450562423037777
94330564272752508
10899999999999999
11240849947059468
1284b360430193bb
132c825835c11732
1411c36337aa45c3
156e0b0eaa2b9ee
hex3328b944c3fff

899999999999999 has 4 divisors (see below), whose sum is σ = 900000060000000. Its totient is φ = 899999940000000.

The previous prime is 899999999999983. The next prime is 900000000000019. The reversal of 899999999999999 is 999999999999998.

Subtracting 899999999999999 from its reverse (999999999999998), we obtain a palindrome (99999999999999).

It is a Cunningham number, because it is equal to 300000002-1.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 899999999999999 - 24 = 899999999999983 is a prime.

It is a super-9 number, since 9×8999999999999999 (a number of 136 digits) contains 999999999 as substring.

It is a Duffinian number.

899999999999999 is a modest number, since divided by 99999999 gives 8999999 as remainder.

It is a plaindrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (899999999999099) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14999999 + ... + 44999999.

It is an arithmetic number, because the mean of its divisors is an integer number (225000015000000).

Almost surely, 2899999999999999 is an apocalyptic number.

899999999999999 is a deficient number, since it is larger than the sum of its proper divisors (60000001).

899999999999999 is a wasteful number, since it uses less digits than its factorization.

899999999999999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60000000.

The product of its digits is 183014339639688, while the sum is 134.

The spelling of 899999999999999 in words is "eight hundred ninety-nine trillion, nine hundred ninety-nine billion, nine hundred ninety-nine million, nine hundred ninety-nine thousand, nine hundred ninety-nine".

Divisors: 1 29999999 30000001 899999999999999