79811727765 has 64 divisors (see below), whose sum is σ = 161224335360. Its totient is φ = 32748618240.

The previous prime is 79811727757. The next prime is 79811727797. The reversal of 79811727765 is 56772711897.

It is not a de Polignac number, because 79811727765 - 2³ = 79811727757 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 79811727699 and 79811727708.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 346104 + ... + 528593.

It is an arithmetic number, because the mean of its divisors is an integer number (2519130240).

Almost surely, 2^79811727765 is an apocalyptic number.

It is an amenable number.

79811727765 is an abundant number, since it is smaller than the sum of its proper divisors (81412607595).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

79811727765 is a wasteful number, since it uses less digits than its factorization.

79811727765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 874802.

The product of its digits is 10372320, while the sum is 60.

The spelling of 79811727765 in words is "seventy-nine billion, eight hundred eleven million, seven hundred twenty-seven thousand, seven hundred sixty-five".