91751664125 has 32 divisors (see below), whose sum is σ = 125165005056. Its totient is φ = 66595320000.

The previous prime is 91751664113. The next prime is 91751664127. The reversal of 91751664125 is 52146615719.

It is not a de Polignac number, because 91751664125 - 2¹² = 91751660029 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 91751664125.

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 31 ways as a sum of consecutive naturals, for example, 625295 + ... + 757955.

It is an arithmetic number, because the mean of its divisors is an integer number (3911406408).

Almost surely, 2^91751664125 is an apocalyptic number.

It is an amenable number.

91751664125 is a deficient number, since it is larger than the sum of its proper divisors (33413340931).

91751664125 is a wasteful number, since it uses less digits than its factorization.

91751664125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133190 (or 133180 counting only the distinct ones).

The product of its digits is 453600, while the sum is 47.

The spelling of 91751664125 in words is "ninety-one billion, seven hundred fifty-one million, six hundred sixty-four thousand, one hundred twenty-five".