79647213937 has 8 divisors (see below), whose sum is σ = 82482388200. Its totient is φ = 76817954304.

The previous prime is 79647213923. The next prime is 79647213949. The reversal of 79647213937 is 73931274697.

It can be written as a sum of positive squares in 4 ways, for example, as 1626992896 + 78020221041 = 40336^2 + 279321^2 .

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

It is not a de Polignac number, because 79647213937 - 2³¹ = 77499730289 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (79647213917) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1451238 + ... + 1505119.

It is an arithmetic number, because the mean of its divisors is an integer number (10310298525).

Almost surely, 2^79647213937 is an apocalyptic number.

It is an amenable number.

79647213937 is a deficient number, since it is larger than the sum of its proper divisors (2835174263).

79647213937 is a wasteful number, since it uses less digits than its factorization.

79647213937 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2957315.

The product of its digits is 12002256, while the sum is 58.

The spelling of 79647213937 in words is "seventy-nine billion, six hundred forty-seven million, two hundred thirteen thousand, nine hundred thirty-seven".