99812591795 has 64 divisors (see below), whose sum is σ = 147649582080. Its totient is φ = 63243307008.

The previous prime is 99812591789. The next prime is 99812591831. The reversal of 99812591795 is 59719521899.

It is not a de Polignac number, because 99812591795 - 2⁶ = 99812591731 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 24503879 + ... + 24507951.

It is an arithmetic number, because the mean of its divisors is an integer number (2307024720).

Almost surely, 2^99812591795 is an apocalyptic number.

99812591795 is a gapful number since it is divisible by the number (95) formed by its first and last digit.

99812591795 is the 257957-th pentagonal number.

99812591795 is a deficient number, since it is larger than the sum of its proper divisors (47836990285).

99812591795 is a wasteful number, since it uses less digits than its factorization.

99812591795 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5004.

The product of its digits is 18370800, while the sum is 65.

The spelling of 99812591795 in words is "ninety-nine billion, eight hundred twelve million, five hundred ninety-one thousand, seven hundred ninety-five".