79071955057 has 4 divisors (see below), whose sum is σ = 79481654500. Its totient is φ = 78662255616.

The previous prime is 79071955051. The next prime is 79071955069. The reversal of 79071955057 is 75055917097.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 31741341921 + 47330613136 = 178161^2 + 217556^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-79071955057 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 79071954989 and 79071955007.

It is not an unprimeable number, because it can be changed into a prime (79071955051) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 204849432 + ... + 204849817.

It is an arithmetic number, because the mean of its divisors is an integer number (19870413625).

Almost surely, 2^79071955057 is an apocalyptic number.

It is an amenable number.

79071955057 is a deficient number, since it is larger than the sum of its proper divisors (409699443).

79071955057 is a wasteful number, since it uses less digits than its factorization.

79071955057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 409699442.

The product of its (nonzero) digits is 3472875, while the sum is 55.

The spelling of 79071955057 in words is "seventy-nine billion, seventy-one million, nine hundred fifty-five thousand, fifty-seven".