79108728867 has 64 divisors (see below), whose sum is σ = 136780723200. Its totient is φ = 44252904960.

The previous prime is 79108728799. The next prime is 79108728893. The reversal of 79108728867 is 76882780197.

It is not a de Polignac number, because 79108728867 - 2²³ = 79100340259 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is not an unprimeable number, because it can be changed into a prime (79108728767) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2672673 + ... + 2702109.

It is an arithmetic number, because the mean of its divisors is an integer number (2137198800).

Almost surely, 2^79108728867 is an apocalyptic number.

79108728867 is a deficient number, since it is larger than the sum of its proper divisors (57671994333).

79108728867 is a wasteful number, since it uses less digits than its factorization.

79108728867 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29753 (or 29747 counting only the distinct ones).

The product of its (nonzero) digits is 18966528, while the sum is 63.

The spelling of 79108728867 in words is "seventy-nine billion, one hundred eight million, seven hundred twenty-eight thousand, eight hundred sixty-seven".