99909986902 has 32 divisors (see below), whose sum is σ = 171311293440. Its totient is φ = 43257318720.

The previous prime is 99909986873. The next prime is 99909986903. The reversal of 99909986902 is 20968990999.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99909986903) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 292143 + ... + 534010.

It is an arithmetic number, because the mean of its divisors is an integer number (5353477920).

Almost surely, 2^99909986902 is an apocalyptic number.

99909986902 is a deficient number, since it is larger than the sum of its proper divisors (71401306538).

99909986902 is a wasteful number, since it uses less digits than its factorization.

99909986902 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 826428.

The product of its (nonzero) digits is 51018336, while the sum is 70.

The spelling of 99909986902 in words is "ninety-nine billion, nine hundred nine million, nine hundred eighty-six thousand, nine hundred two".