99796475520 has 1024 divisors, whose sum is σ = 429359616000. Its totient is φ = 21399552000.

The previous prime is 99796475507. The next prime is 99796475543. The reversal of 99796475520 is 2557469799.

99796475520 is a `hidden beast` number, since 9 + 9 + 79 + 6 + 4 + 7 + 552 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 397595395 + ... + 397595645.

It is an arithmetic number, because the mean of its divisors is an integer number (419296500).

Almost surely, 2^99796475520 is an apocalyptic number.

99796475520 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 99796475520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (214679808000).

99796475520 is an abundant number, since it is smaller than the sum of its proper divisors (329563140480).

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

99796475520 is a wasteful number, since it uses less digits than its factorization.

99796475520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 478 (or 460 counting only the distinct ones).

The product of its (nonzero) digits is 42865200, while the sum is 63.

The spelling of 99796475520 in words is "ninety-nine billion, seven hundred ninety-six million, four hundred seventy-five thousand, five hundred twenty".