79731872465 has 16 divisors (see below), whose sum is σ = 115778719872. Its totient is φ = 51457208064.

The previous prime is 79731872461. The next prime is 79731872531. The reversal of 79731872465 is 56427813797.

It is a happy number.

It is not a de Polignac number, because 79731872465 - 2² = 79731872461 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (79731872461) 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, 67000979 + ... + 67002168.

It is an arithmetic number, because the mean of its divisors is an integer number (7236169992).

Almost surely, 2^79731872465 is an apocalyptic number.

It is an amenable number.

79731872465 is a deficient number, since it is larger than the sum of its proper divisors (36046847407).

79731872465 is a wasteful number, since it uses less digits than its factorization.

79731872465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134003176.

The product of its digits is 17781120, while the sum is 59.

The spelling of 79731872465 in words is "seventy-nine billion, seven hundred thirty-one million, eight hundred seventy-two thousand, four hundred sixty-five".