99231135234078 has 32 divisors (see below), whose sum is σ = 203827342934016. Its totient is φ = 32182877099808.

The previous prime is 99231135234073. The next prime is 99231135234079. The reversal of 99231135234078 is 87043253113299.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99231135234073) 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, 38219875 + ... + 40733537.

It is an arithmetic number, because the mean of its divisors is an integer number (6369604466688).

Almost surely, 2^{99231135234078} is an apocalyptic number.

99231135234078 is an abundant number, since it is smaller than the sum of its proper divisors (104596207699938).

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

99231135234078 is a wasteful number, since it uses less digits than its factorization.

99231135234078 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2691528.

The product of its (nonzero) digits is 9797760, while the sum is 57.

The spelling of 99231135234078 in words is "ninety-nine trillion, two hundred thirty-one billion, one hundred thirty-five million, two hundred thirty-four thousand, seventy-eight".