91751664124 has 24 divisors (see below), whose sum is σ = 167578524288. Its totient is φ = 43872847920.

The previous prime is 91751664113. The next prime is 91751664127. The reversal of 91751664124 is 42146615719.

It is a Harshad number since it is a multiple of its sum of digits (46).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91751664127) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 403039 + ... + 588169.

It is an arithmetic number, because the mean of its divisors is an integer number (6982438512).

Almost surely, 2^91751664124 is an apocalyptic number.

It is an amenable number.

91751664124 is a deficient number, since it is larger than the sum of its proper divisors (75826860164).

91751664124 is a wasteful number, since it uses less digits than its factorization.

91751664124 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 190545 (or 190543 counting only the distinct ones).

The product of its digits is 362880, while the sum is 46.

The spelling of 91751664124 in words is "ninety-one billion, seven hundred fifty-one million, six hundred sixty-four thousand, one hundred twenty-four".