99918925506 has 96 divisors (see below), whose sum is σ = 223119344448. Its totient is φ = 32298618240.

The previous prime is 99918925441. The next prime is 99918925517. The reversal of 99918925506 is 60552981999.

99918925506 is a `hidden beast` number, since 9 + 99 + 18 + 9 + 25 + 506 = 666.

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, 97863276 + ... + 97864296.

It is an arithmetic number, because the mean of its divisors is an integer number (2324159838).

Almost surely, 2^99918925506 is an apocalyptic number.

99918925506 is an abundant number, since it is smaller than the sum of its proper divisors (123200418942).

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

99918925506 is a wasteful number, since it uses less digits than its factorization.

99918925506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1856 (or 1853 counting only the distinct ones).

The product of its (nonzero) digits is 15746400, while the sum is 63.

The spelling of 99918925506 in words is "ninety-nine billion, nine hundred eighteen million, nine hundred twenty-five thousand, five hundred six".