79885772187 has 16 divisors (see below), whose sum is σ = 114741634560. Its totient is φ = 49145964192.

The previous prime is 79885772111. The next prime is 79885772221. The reversal of 79885772187 is 78127758897.

It is not a de Polignac number, because 79885772187 - 2²⁴ = 79868994971 is a prime.

It is not an unprimeable number, because it can be changed into a prime (79885774187) 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, 167737 + ... + 433482.

It is an arithmetic number, because the mean of its divisors is an integer number (7171352160).

Almost surely, 2^79885772187 is an apocalyptic number.

79885772187 is a deficient number, since it is larger than the sum of its proper divisors (34855862373).

79885772187 is a wasteful number, since it uses less digits than its factorization.

79885772187 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 604642.

The product of its digits is 110638080, while the sum is 69.

The spelling of 79885772187 in words is "seventy-nine billion, eight hundred eighty-five million, seven hundred seventy-two thousand, one hundred eighty-seven".