79216564623844 has 12 divisors (see below), whose sum is σ = 138643251868800. Its totient is φ = 39604206947048.

The previous prime is 79216564623827. The next prime is 79216564623851. The reversal of 79216564623844 is 44832646561297.

It is a super-2 number, since 2×79216564623844² (a number of 29 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 79216564623844.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 1018797484 + ... + 1018875235.

It is an arithmetic number, because the mean of its divisors is an integer number (11553604322400).

Almost surely, 2^{79216564623844} is an apocalyptic number.

It is an amenable number.

79216564623844 is a deficient number, since it is larger than the sum of its proper divisors (59426687244956).

79216564623844 is a wasteful number, since it uses less digits than its factorization.

79216564623844 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2037682442 (or 2037682440 counting only the distinct ones).

The product of its digits is 418037760, while the sum is 67.

The spelling of 79216564623844 in words is "seventy-nine trillion, two hundred sixteen billion, five hundred sixty-four million, six hundred twenty-three thousand, eight hundred forty-four".