91904753368640 has 56 divisors (see below), whose sum is σ = 230366519972160. Its totient is φ = 34827064432128.

The previous prime is 91904753368613. The next prime is 91904753368663. The reversal of 91904753368640 is 4686335740919.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7557950612 + ... + 7557962771.

Almost surely, 2^{91904753368640} is an apocalyptic number.

It is an amenable number.

91904753368640 is an abundant number, since it is smaller than the sum of its proper divisors (138461766603520).

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

91904753368640 is a wasteful number, since it uses less digits than its factorization.

91904753368640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15115913419 (or 15115913409 counting only the distinct ones).

The product of its (nonzero) digits is 117573120, while the sum is 65.

The spelling of 91904753368640 in words is "ninety-one trillion, nine hundred four billion, seven hundred fifty-three million, three hundred sixty-eight thousand, six hundred forty".