79542256658 has 18 divisors (see below), whose sum is σ = 126755473653. Its totient is φ = 37428459360.

The previous prime is 79542256627. The next prime is 79542256679. The reversal of 79542256658 is 85665224597.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 72799054969 + 6743201689 = 269813^2 + 82117^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=199427.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 79542256597 and 79542256606.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 6774653 + ... + 6786383.

Almost surely, 2^79542256658 is an apocalyptic number.

79542256658 is a deficient number, since it is larger than the sum of its proper divisors (47213216995).

79542256658 is an frugal number, since it uses more digits than its factorization.

79542256658 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23498 (or 11750 counting only the distinct ones).

The product of its digits is 36288000, while the sum is 59.

The spelling of 79542256658 in words is "seventy-nine billion, five hundred forty-two million, two hundred fifty-six thousand, six hundred fifty-eight".