79293643644 has 12 divisors (see below), whose sum is σ = 185018501864. Its totient is φ = 26431214544.

The previous prime is 79293643621. The next prime is 79293643651. The reversal of 79293643644 is 44634639297.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3303901807 + ... + 3303901830.

Almost surely, 2^79293643644 is an apocalyptic number.

It is an amenable number.

79293643644 is an abundant number, since it is smaller than the sum of its proper divisors (105724858220).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

79293643644 is a wasteful number, since it uses less digits than its factorization.

79293643644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6607803644 (or 6607803642 counting only the distinct ones).

The product of its digits is 23514624, while the sum is 57.

The spelling of 79293643644 in words is "seventy-nine billion, two hundred ninety-three million, six hundred forty-three thousand, six hundred forty-four".