91749151007928 has 24 divisors (see below), whose sum is σ = 248487283980000. Its totient is φ = 30583050335952.

The previous prime is 91749151007893. The next prime is 91749151008017. The reversal of 91749151007928 is 82970015194719.

91749151007928 is a `hidden beast` number, since 9 + 1 + 7 + 4 + 91 + 510 + 0 + 7 + 9 + 28 = 666.

It is a tau number, because it is divible by the number of its divisors (24).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 637146881928 + ... + 637146882071.

It is an arithmetic number, because the mean of its divisors is an integer number (10353636832500).

Almost surely, 2^{91749151007928} is an apocalyptic number.

It is an amenable number.

91749151007928 is an abundant number, since it is smaller than the sum of its proper divisors (156738132972072).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

91749151007928 is a wasteful number, since it uses less digits than its factorization.

91749151007928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1274293764011 (or 1274293764004 counting only the distinct ones).

The product of its (nonzero) digits is 11430720, while the sum is 63.

The spelling of 91749151007928 in words is "ninety-one trillion, seven hundred forty-nine billion, one hundred fifty-one million, seven thousand, nine hundred twenty-eight".