91121464512 has 140 divisors (see below), whose sum is σ = 290890671456. Its totient is φ = 28037352960.

The previous prime is 91121464493. The next prime is 91121464513. The reversal of 91121464512 is 21546412119.

91121464512 is a `hidden beast` number, since 9 + 1 + 1 + 2 + 1 + 4 + 645 + 1 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (91121464513) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 608664 + ... + 743447.

Almost surely, 2^91121464512 is an apocalyptic number.

It is an amenable number.

91121464512 is an abundant number, since it is smaller than the sum of its proper divisors (199769206944).

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

91121464512 is a wasteful number, since it uses less digits than its factorization.

91121464512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1352148 (or 1352129 counting only the distinct ones).

The product of its digits is 17280, while the sum is 36.

The spelling of 91121464512 in words is "ninety-one billion, one hundred twenty-one million, four hundred sixty-four thousand, five hundred twelve".