91751842608 has 40 divisors (see below), whose sum is σ = 242068697088. Its totient is φ = 29933224512.

The previous prime is 91751842601. The next prime is 91751842613. The reversal of 91751842608 is 80624815719.

It is not an unprimeable number, because it can be changed into a prime (91751842601) 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, 20332816 + ... + 20337327.

Almost surely, 2^91751842608 is an apocalyptic number.

It is an amenable number.

91751842608 is an abundant number, since it is smaller than the sum of its proper divisors (150316854480).

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

91751842608 is a wasteful number, since it uses less digits than its factorization.

91751842608 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40670201 (or 40670195 counting only the distinct ones).

The product of its (nonzero) digits is 967680, while the sum is 51.

The spelling of 91751842608 in words is "ninety-one billion, seven hundred fifty-one million, eight hundred forty-two thousand, six hundred eight".