99658655880 has 192 divisors, whose sum is σ = 355877375040. Its totient is φ = 22249317888.

The previous prime is 99658655861. The next prime is 99658655959. The reversal of 99658655880 is 8855685699.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 55762 + ... + 449918.

It is an arithmetic number, because the mean of its divisors is an integer number (1853527995).

Almost surely, 2^99658655880 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 99658655880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (177938687520).

99658655880 is an abundant number, since it is smaller than the sum of its proper divisors (256218719160).

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

99658655880 is a wasteful number, since it uses less digits than its factorization.

99658655880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 394228 (or 394217 counting only the distinct ones).

The product of its (nonzero) digits is 186624000, while the sum is 69.

The spelling of 99658655880 in words is "ninety-nine billion, six hundred fifty-eight million, six hundred fifty-five thousand, eight hundred eighty".