79885772185 has 8 divisors (see below), whose sum is σ = 95946075720. Its totient is φ = 63853185024.

The previous prime is 79885772111. The next prime is 79885772221. The reversal of 79885772185 is 58127758897.

It can be written as a sum of positive squares in 4 ways, for example, as 33245322889 + 46640449296 = 182333^2 + 215964^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-79885772185 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 79885772185.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6922750 + ... + 6934279.

It is an arithmetic number, because the mean of its divisors is an integer number (11993259465).

Almost surely, 2^79885772185 is an apocalyptic number.

It is an amenable number.

79885772185 is a deficient number, since it is larger than the sum of its proper divisors (16060303535).

79885772185 is a wasteful number, since it uses less digits than its factorization.

79885772185 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13858187.

The product of its digits is 79027200, while the sum is 67.

The spelling of 79885772185 in words is "seventy-nine billion, eight hundred eighty-five million, seven hundred seventy-two thousand, one hundred eighty-five".