91512478855832 has 16 divisors (see below), whose sum is σ = 171774246823200. Its totient is φ = 45706013036320.

The previous prime is 91512478855813. The next prime is 91512478855841. The reversal of 91512478855832 is 23855887421519.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6278291207 + ... + 6278305782.

It is an arithmetic number, because the mean of its divisors is an integer number (10735890426450).

Almost surely, 2^{91512478855832} is an apocalyptic number.

It is an amenable number.

91512478855832 is a deficient number, since it is larger than the sum of its proper divisors (80261767967368).

91512478855832 is a wasteful number, since it uses less digits than its factorization.

91512478855832 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12556597906 (or 12556597902 counting only the distinct ones).

The product of its digits is 193536000, while the sum is 68.

The spelling of 91512478855832 in words is "ninety-one trillion, five hundred twelve billion, four hundred seventy-eight million, eight hundred fifty-five thousand, eight hundred thirty-two".