91626989568 has 48 divisors (see below), whose sum is σ = 244279002240. Its totient is φ = 30542327808.

The previous prime is 91626989567. The next prime is 91626989581. The reversal of 91626989568 is 86598962619.

It is a tau number, because it is divible by the number of its divisors (48).

It is not an unprimeable number, because it can be changed into a prime (91626989561) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7450480 + ... + 7462767.

It is an arithmetic number, because the mean of its divisors is an integer number (5089145880).

Almost surely, 2^91626989568 is an apocalyptic number.

It is an amenable number.

91626989568 is an abundant number, since it is smaller than the sum of its proper divisors (152652012672).

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

91626989568 is a wasteful number, since it uses less digits than its factorization.

91626989568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14913272 (or 14913252 counting only the distinct ones).

The product of its digits is 100776960, while the sum is 69.

The spelling of 91626989568 in words is "ninety-one billion, six hundred twenty-six million, nine hundred eighty-nine thousand, five hundred sixty-eight".