79761939904 has 14 divisors (see below), whose sum is σ = 158277599624. Its totient is φ = 39880969920.

The previous prime is 79761939883. The next prime is 79761939919. The reversal of 79761939904 is 40993916797.

It is a Harshad number since it is a multiple of its sum of digits (64), and also a Moran number because the ratio is a prime number: 1246280311 = 79761939904 / (7 + 9 + 7 + 6 + 1 + 9 + 3 + 9 + 9 + 0 + 4).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 623140092 + ... + 623140219.

Almost surely, 2^79761939904 is an apocalyptic number.

It is an amenable number.

79761939904 is a deficient number, since it is larger than the sum of its proper divisors (78515659720).

79761939904 is a wasteful number, since it uses less digits than its factorization.

79761939904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1246280323 (or 1246280313 counting only the distinct ones).

The product of its (nonzero) digits is 23147208, while the sum is 64.

The spelling of 79761939904 in words is "seventy-nine billion, seven hundred sixty-one million, nine hundred thirty-nine thousand, nine hundred four".