99606656138 has 16 divisors (see below), whose sum is σ = 163411728480. Its totient is φ = 45159358800.

The previous prime is 99606656137. The next prime is 99606656147. The reversal of 99606656138 is 83165660699.

It is not an unprimeable number, because it can be changed into a prime (99606656137) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5810948 + ... + 5828063.

It is an arithmetic number, because the mean of its divisors is an integer number (10213233030).

Almost surely, 2^99606656138 is an apocalyptic number.

99606656138 is a deficient number, since it is larger than the sum of its proper divisors (63805072342).

99606656138 is a wasteful number, since it uses less digits than its factorization.

99606656138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11639413.

The product of its (nonzero) digits is 12597120, while the sum is 59.

The spelling of 99606656138 in words is "ninety-nine billion, six hundred six million, six hundred fifty-six thousand, one hundred thirty-eight".