91747472679 has 6 divisors (see below), whose sum is σ = 132524127216. Its totient is φ = 61164981780.

The previous prime is 91747472653. The next prime is 91747472741. The reversal of 91747472679 is 97627474719.

91747472679 is a `hidden beast` number, since 91 + 7 + 4 + 7 + 472 + 6 + 79 = 666.

It is not a de Polignac number, because 91747472679 - 2¹² = 91747468583 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91747472629) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 5097081807 + ... + 5097081824.

It is an arithmetic number, because the mean of its divisors is an integer number (22087354536).

Almost surely, 2^91747472679 is an apocalyptic number.

91747472679 is a deficient number, since it is larger than the sum of its proper divisors (40776654537).

91747472679 is a wasteful number, since it uses less digits than its factorization.

91747472679 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10194163637 (or 10194163634 counting only the distinct ones).

The product of its digits is 37340352, while the sum is 63.

The spelling of 91747472679 in words is "ninety-one billion, seven hundred forty-seven million, four hundred seventy-two thousand, six hundred seventy-nine".