79731211755 has 64 divisors (see below), whose sum is σ = 142883112960. Its totient is φ = 37707710976.

The previous prime is 79731211751. The next prime is 79731211771. The reversal of 79731211755 is 55711213797.

It is not a de Polignac number, because 79731211755 - 2² = 79731211751 is a prime.

It is a super-2 number, since 2×79731211755² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (79731211751) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 500044 + ... + 639926.

It is an arithmetic number, because the mean of its divisors is an integer number (2232548640).

Almost surely, 2^79731211755 is an apocalyptic number.

79731211755 is a deficient number, since it is larger than the sum of its proper divisors (63151901205).

79731211755 is a wasteful number, since it uses less digits than its factorization.

79731211755 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140020.

The product of its digits is 463050, while the sum is 48.

The spelling of 79731211755 in words is "seventy-nine billion, seven hundred thirty-one million, two hundred eleven thousand, seven hundred fifty-five".