779997679872 has 72 divisors (see below), whose sum is σ = 2106915513696. Its totient is φ = 256118624256.

The previous prime is 779997679753. The next prime is 779997679883. The reversal of 779997679872 is 278976799977.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7527813 + ... + 7630724.

It is an arithmetic number, because the mean of its divisors is an integer number (29262715468).

Almost surely, 2^779997679872 is an apocalyptic number.

It is an amenable number.

779997679872 is an abundant number, since it is smaller than the sum of its proper divisors (1326917833824).

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

779997679872 is a wasteful number, since it uses less digits than its factorization.

779997679872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15158623 (or 15158609 counting only the distinct ones).

The product of its digits is 10585989792, while the sum is 87.

The spelling of 779997679872 in words is "seven hundred seventy-nine billion, nine hundred ninety-seven million, six hundred seventy-nine thousand, eight hundred seventy-two".