79920831643920 has 120 divisors (see below), whose sum is σ = 270514185317376. Its totient is φ = 21144408977664.

The previous prime is 79920831643903. The next prime is 79920831643993. The reversal of 79920831643920 is 2934613802997.

79920831643920 is a `hidden beast` number, since 7 + 9 + 9 + 2 + 0 + 83 + 164 + 392 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (120).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 436920982 + ... + 437103861.

Almost surely, 2^{79920831643920} is an apocalyptic number.

It is an amenable number.

79920831643920 is an abundant number, since it is smaller than the sum of its proper divisors (190593353673456).

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

79920831643920 is a wasteful number, since it uses less digits than its factorization.

79920831643920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 874024989 (or 874024980 counting only the distinct ones).

The product of its (nonzero) digits is 35271936, while the sum is 63.

The spelling of 79920831643920 in words is "seventy-nine trillion, nine hundred twenty billion, eight hundred thirty-one million, six hundred forty-three thousand, nine hundred twenty".