79807771137 has 32 divisors (see below), whose sum is σ = 109143264384. Its totient is φ = 51855897600.

The previous prime is 79807771097. The next prime is 79807771151. The reversal of 79807771137 is 73117770897.

It is not a de Polignac number, because 79807771137 - 2⁷ = 79807771009 is a prime.

It is a Smith number, since the sum of its digits (57) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (79807776137) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 19104393 + ... + 19108569.

It is an arithmetic number, because the mean of its divisors is an integer number (3410727012).

Almost surely, 2^79807771137 is an apocalyptic number.

It is an amenable number.

79807771137 is a deficient number, since it is larger than the sum of its proper divisors (29335493247).

79807771137 is a wasteful number, since it uses less digits than its factorization.

79807771137 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5169.

The product of its (nonzero) digits is 3630312, while the sum is 57.

The spelling of 79807771137 in words is "seventy-nine billion, eight hundred seven million, seven hundred seventy-one thousand, one hundred thirty-seven".