79129749591 has 12 divisors (see below), whose sum is σ = 115675618968. Its totient is φ = 52117585584.

The previous prime is 79129749583. The next prime is 79129749617. The reversal of 79129749591 is 19594792197.

It is a happy number.

It is not a de Polignac number, because 79129749591 - 2³ = 79129749583 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79129749511) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 52964280 + ... + 52965773.

It is an arithmetic number, because the mean of its divisors is an integer number (9639634914).

Almost surely, 2^79129749591 is an apocalyptic number.

79129749591 is a deficient number, since it is larger than the sum of its proper divisors (36545869377).

79129749591 is a wasteful number, since it uses less digits than its factorization.

79129749591 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105930142 (or 105930139 counting only the distinct ones).

The product of its digits is 12859560, while the sum is 63.

The spelling of 79129749591 in words is "seventy-nine billion, one hundred twenty-nine million, seven hundred forty-nine thousand, five hundred ninety-one".