79358643658 has 16 divisors (see below), whose sum is σ = 136272818880. Its totient is φ = 33953489856.

The previous prime is 79358643601. The next prime is 79358643667. The reversal of 79358643658 is 85634685397.

It is a super-3 number, since 3×79358643658³ (a number of 34 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 79358643658.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4771188 + ... + 4787791.

It is an arithmetic number, because the mean of its divisors is an integer number (8517051180).

Almost surely, 2^79358643658 is an apocalyptic number.

79358643658 is a deficient number, since it is larger than the sum of its proper divisors (56914175222).

79358643658 is a wasteful number, since it uses less digits than its factorization.

79358643658 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9559581.

The product of its digits is 130636800, while the sum is 64.

The spelling of 79358643658 in words is "seventy-nine billion, three hundred fifty-eight million, six hundred forty-three thousand, six hundred fifty-eight".