91554616512 has 42 divisors (see below), whose sum is σ = 262424779188. Its totient is φ = 30518205312.

The previous prime is 91554616481. The next prime is 91554616541. The reversal of 91554616512 is 21561645519.

91554616512 is a `hidden beast` number, since 9 + 15 + 5 + 4 + 616 + 5 + 12 = 666.

It is a super-2 number, since 2×91554616512² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 79473918 + ... + 79475069.

Almost surely, 2^91554616512 is an apocalyptic number.

It is an amenable number.

91554616512 is an abundant number, since it is smaller than the sum of its proper divisors (170870162676).

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

91554616512 is a wasteful number, since it uses less digits than its factorization.

91554616512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 158949005 (or 158948992 counting only the distinct ones).

The product of its digits is 324000, while the sum is 45.

The spelling of 91554616512 in words is "ninety-one billion, five hundred fifty-four million, six hundred sixteen thousand, five hundred twelve".