91087087432 has 16 divisors (see below), whose sum is σ = 186314497200. Its totient is φ = 41403221520.

The previous prime is 91087087411. The next prime is 91087087489. The reversal of 91087087432 is 23478078019.

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, 517540182 + ... + 517540357.

It is an arithmetic number, because the mean of its divisors is an integer number (11644656075).

Almost surely, 2^91087087432 is an apocalyptic number.

It is an amenable number.

91087087432 is an abundant number, since it is smaller than the sum of its proper divisors (95227409768).

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

91087087432 is a wasteful number, since it uses less digits than its factorization.

91087087432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1035080556 (or 1035080552 counting only the distinct ones).

The product of its (nonzero) digits is 677376, while the sum is 49.

The spelling of 91087087432 in words is "ninety-one billion, eighty-seven million, eighty-seven thousand, four hundred thirty-two".