79650861918 has 32 divisors (see below), whose sum is σ = 163417220736. Its totient is φ = 25867483488.

The previous prime is 79650861887. The next prime is 79650861929. The reversal of 79650861918 is 81916805697.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 286396 + ... + 491247.

It is an arithmetic number, because the mean of its divisors is an integer number (5106788148).

Almost surely, 2^79650861918 is an apocalyptic number.

79650861918 is an abundant number, since it is smaller than the sum of its proper divisors (83766358818).

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

79650861918 is a wasteful number, since it uses less digits than its factorization.

79650861918 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 778088.

The product of its (nonzero) digits is 6531840, while the sum is 60.

The spelling of 79650861918 in words is "seventy-nine billion, six hundred fifty million, eight hundred sixty-one thousand, nine hundred eighteen".