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99999990000000 = 2732572394649
BaseRepresentation
bin10110101111001100001111…
…111000011010100110000000
3111010001220110020111110212100
4112233030033320122212000
5101101344434420000000
6552403210004230400
730030521655142566
oct2657141770324600
9433056406443770
1099999990000000
11299548373a7012
12b27080239b400
1343a4c6005439c
141a9a04d76ba36
15b86368996a00
hex5af30fe1a980

99999990000000 has 768 divisors, whose sum is σ = 361282278240000. Its totient is φ = 26549376000000.

The previous prime is 99999989999983. The next prime is 99999990000107. The reversal of 99999990000000 is 9999999.

Adding to 99999990000000 its reverse (9999999), we get a palindrome (99999999999999).

Subtracting from 99999990000000 its reverse (9999999), we obtain a square (99999980000001 = 99999992).

99999990000000 divided by its reverse (9999999) gives a 7-th power (10000000 = 107).

It is a nialpdrome in base 10.

It is a zygodrome in base 10.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 21509997676 + ... + 21510002324.

It is an arithmetic number, because the mean of its divisors is an integer number (470419633125).

Almost surely, 299999990000000 is an apocalyptic number.

99999990000000 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is a pronic number, being equal to 9999999×10000000.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 99999990000000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (180641139120000).

99999990000000 is an abundant number, since it is smaller than the sum of its proper divisors (261282288240000).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

99999990000000 is an frugal number, since it uses more digits than its factorization.

99999990000000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4943 (or 4898 counting only the distinct ones).

The product of its (nonzero) digits is 4782969, while the sum is 63.

The spelling of 99999990000000 in words is "ninety-nine trillion, nine hundred ninety-nine billion, nine hundred ninety million", and thus it is an aban number.