79158407691 has 16 divisors (see below), whose sum is σ = 121912414848. Its totient is φ = 45152745600.

The previous prime is 79158407681. The next prime is 79158407737. The reversal of 79158407691 is 19670485197.

It is not a de Polignac number, because 79158407691 - 2¹⁰ = 79158406667 is a prime.

It is not an unprimeable number, because it can be changed into a prime (79158407641) 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, 70550605 + ... + 70551726.

It is an arithmetic number, because the mean of its divisors is an integer number (7619525928).

Almost surely, 2^79158407691 is an apocalyptic number.

79158407691 is a deficient number, since it is larger than the sum of its proper divisors (42754007157).

79158407691 is a wasteful number, since it uses less digits than its factorization.

79158407691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141102362.

The product of its (nonzero) digits is 3810240, while the sum is 57.

The spelling of 79158407691 in words is "seventy-nine billion, one hundred fifty-eight million, four hundred seven thousand, six hundred ninety-one".