79157388646 has 16 divisors (see below), whose sum is σ = 136688882976. Its totient is φ = 33676969536.

The previous prime is 79157388623. The next prime is 79157388679. The reversal of 79157388646 is 64688375197.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20633481 + ... + 20637316.

It is an arithmetic number, because the mean of its divisors is an integer number (8543055186).

Almost surely, 2^79157388646 is an apocalyptic number.

79157388646 is a deficient number, since it is larger than the sum of its proper divisors (57531494330).

79157388646 is a wasteful number, since it uses less digits than its factorization.

79157388646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41270943.

The product of its digits is 60963840, while the sum is 64.

The spelling of 79157388646 in words is "seventy-nine billion, one hundred fifty-seven million, three hundred eighty-eight thousand, six hundred forty-six".