91099951532 has 12 divisors (see below), whose sum is σ = 163132471656. Its totient is φ = 44490673920.

The previous prime is 91099951519. The next prime is 91099951559. The reversal of 91099951532 is 23515999019.

It is a hoax number, since the sum of its digits (53) coincides with the sum of the digits of its distinct prime factors.

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, 264825269 + ... + 264825612.

It is an arithmetic number, because the mean of its divisors is an integer number (13594372638).

Almost surely, 2^91099951532 is an apocalyptic number.

It is an amenable number.

91099951532 is a deficient number, since it is larger than the sum of its proper divisors (72032520124).

91099951532 is a wasteful number, since it uses less digits than its factorization.

91099951532 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 529650928 (or 529650926 counting only the distinct ones).

The product of its (nonzero) digits is 984150, while the sum is 53.

The spelling of 91099951532 in words is "ninety-one billion, ninety-nine million, nine hundred fifty-one thousand, five hundred thirty-two".