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999999000999 = 34173719627451
BaseRepresentation
bin11101000110101001001…
…01011101000110100111
310112121011122112200010000
432203110211131012213
5112340444221012444
62043220533032343
7132150623155335
oct16432445350647
93477148480100
10999999000999
11356108403379
121419817856b3
13733b8008c0b
1436586266b55
151b02b61a469
hexe8d495d1a7

999999000999 has 40 divisors (see below), whose sum is σ = 1624446437328. Its totient is φ = 610492204800.

The previous prime is 999999000961. The next prime is 999999001013. The reversal of 999999000999 is 999000999999.

It can be divided in two parts, 999999000 and 999, that added together give a palindrome (999999999).

It is not a de Polignac number, because 999999000999 - 28 = 999999000743 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (81).

It is a zygodrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (999999000929) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 9762777 + ... + 9864674.

Almost surely, 2999999000999 is an apocalyptic number.

999999000999 is a deficient number, since it is larger than the sum of its proper divisors (624447436329).

999999000999 is a wasteful number, since it uses less digits than its factorization.

999999000999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19627517 (or 19627508 counting only the distinct ones).

The product of its (nonzero) digits is 387420489, while the sum is 81.

The spelling of 999999000999 in words is "nine hundred ninety-nine billion, nine hundred ninety-nine million, nine hundred ninety-nine", and thus it is an aban number.

Divisors: 1 3 9 17 27 37 51 81 111 153 333 459 629 999 1377 1887 2997 5661 16983 50949 19627451 58882353 176647059 333666667 529941177 726215687 1001000001 1589823531 2178647061 3003000003 6535941183 9009000009 12345666679 19607823549 27027000027 37037000037 58823470647 111111000111 333333000333 999999000999