79855793139 has 16 divisors (see below), whose sum is σ = 112383726080. Its totient is φ = 50297798880.

The previous prime is 79855793113. The next prime is 79855793153. The reversal of 79855793139 is 93139755897.

It is not a de Polignac number, because 79855793139 - 2⁵ = 79855793107 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 79855793139.

It is not an unprimeable number, because it can be changed into a prime (79855793939) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1887772 + ... + 1929609.

It is an arithmetic number, because the mean of its divisors is an integer number (7023982880).

Almost surely, 2^79855793139 is an apocalyptic number.

79855793139 is a deficient number, since it is larger than the sum of its proper divisors (32527932941).

79855793139 is a wasteful number, since it uses less digits than its factorization.

79855793139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3817770.

The product of its digits is 64297800, while the sum is 66.

The spelling of 79855793139 in words is "seventy-nine billion, eight hundred fifty-five million, seven hundred ninety-three thousand, one hundred thirty-nine".