79839321775 has 12 divisors (see below), whose sum is σ = 99009492352. Its totient is φ = 63865823040.

The previous prime is 79839321767. The next prime is 79839321787. The reversal of 79839321775 is 57712393897.

It is not a de Polignac number, because 79839321775 - 2³ = 79839321767 is a prime.

It is a hoax number, since the sum of its digits (61) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 160882 + ... + 430768.

Almost surely, 2^79839321775 is an apocalyptic number.

79839321775 is a deficient number, since it is larger than the sum of its proper divisors (19170170577).

79839321775 is a wasteful number, since it uses less digits than its factorization.

79839321775 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 281730 (or 281725 counting only the distinct ones).

The product of its digits is 20003760, while the sum is 61.

The spelling of 79839321775 in words is "seventy-nine billion, eight hundred thirty-nine million, three hundred twenty-one thousand, seven hundred seventy-five".