91853057232 has 120 divisors (see below), whose sum is σ = 268436223744. Its totient is φ = 29264792832.

The previous prime is 91853057207. The next prime is 91853057239. The reversal of 91853057232 is 23275035819.

91853057232 is a `hidden beast` number, since 9 + 18 + 5 + 30 + 572 + 32 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91853057239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4802793 + ... + 4821879.

Almost surely, 2^91853057232 is an apocalyptic number.

91853057232 is a gapful number since it is divisible by the number (92) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 91853057232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (134218111872).

91853057232 is an abundant number, since it is smaller than the sum of its proper divisors (176583166512).

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

91853057232 is a wasteful number, since it uses less digits than its factorization.

91853057232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20577 (or 20568 counting only the distinct ones).

The product of its (nonzero) digits is 453600, while the sum is 45.

The spelling of 91853057232 in words is "ninety-one billion, eight hundred fifty-three million, fifty-seven thousand, two hundred thirty-two".