7977879692 has 12 divisors (see below), whose sum is σ = 13981498776. Its totient is φ = 3983165760.

The previous prime is 7977879683. The next prime is 7977879703. The reversal of 7977879692 is 2969787797.

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, 1440413 + ... + 1445940.

It is an arithmetic number, because the mean of its divisors is an integer number (1165124898).

Almost surely, 2^7977879692 is an apocalyptic number.

It is an amenable number.

7977879692 is a deficient number, since it is larger than the sum of its proper divisors (6003619084).

7977879692 is a wasteful number, since it uses less digits than its factorization.

7977879692 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2887048 (or 2887046 counting only the distinct ones).

The product of its digits is 168031584, while the sum is 71.

The square root of 7977879692 is about 89318.9772220887. The cubic root of 7977879692 is about 1998.1549393991.

The spelling of 7977879692 in words is "seven billion, nine hundred seventy-seven million, eight hundred seventy-nine thousand, six hundred ninety-two".