79264138588581 has 16 divisors (see below), whose sum is σ = 106143900871680. Its totient is φ = 52613715798000.

The previous prime is 79264138588529. The next prime is 79264138588667. The reversal of 79264138588581 is 18588583146297.

It is not a de Polignac number, because 79264138588581 - 2¹⁷ = 79264138457509 is a prime.

It is a super-2 number, since 2×79264138588581² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79264138588501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16372141 + ... + 20653698.

It is an arithmetic number, because the mean of its divisors is an integer number (6633993804480).

Almost surely, 2^{79264138588581} is an apocalyptic number.

It is an amenable number.

79264138588581 is a deficient number, since it is larger than the sum of its proper divisors (26879762283099).

79264138588581 is a wasteful number, since it uses less digits than its factorization.

79264138588581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37028936.

The product of its digits is 928972800, while the sum is 75.

The spelling of 79264138588581 in words is "seventy-nine trillion, two hundred sixty-four billion, one hundred thirty-eight million, five hundred eighty-eight thousand, five hundred eighty-one".