79712426840 has 16 divisors (see below), whose sum is σ = 179352960480. Its totient is φ = 31884970720.

The previous prime is 79712426837. The next prime is 79712426861. The reversal of 79712426840 is 4862421797.

It is a happy number.

It is a congruent number.

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, 996405296 + ... + 996405375.

It is an arithmetic number, because the mean of its divisors is an integer number (11209560030).

Almost surely, 2^79712426840 is an apocalyptic number.

It is an amenable number.

79712426840 is an abundant number, since it is smaller than the sum of its proper divisors (99640533640).

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

79712426840 is a wasteful number, since it uses less digits than its factorization.

79712426840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1992810682 (or 1992810678 counting only the distinct ones).

The product of its (nonzero) digits is 1354752, while the sum is 50.

The spelling of 79712426840 in words is "seventy-nine billion, seven hundred twelve million, four hundred twenty-six thousand, eight hundred forty".