91791023088 has 40 divisors (see below), whose sum is σ = 241600907088. Its totient is φ = 30019704832.

The previous prime is 91791023087. The next prime is 91791023089. The reversal of 91791023088 is 88032019719.

It is an interprime number because it is at equal distance from previous prime (91791023087) and next prime (91791023089).

It is a hoax number, since the sum of its digits (48) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91791023087) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18038145 + ... + 18043232.

Almost surely, 2^91791023088 is an apocalyptic number.

It is an amenable number.

91791023088 is an abundant number, since it is smaller than the sum of its proper divisors (149809884000).

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

91791023088 is a wasteful number, since it uses less digits than its factorization.

91791023088 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36081441 (or 36081435 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 48.

The spelling of 91791023088 in words is "ninety-one billion, seven hundred ninety-one million, twenty-three thousand, eighty-eight".