91540802160 has 120 divisors (see below), whose sum is σ = 318810688560. Its totient is φ = 24410875392.

The previous prime is 91540802159. The next prime is 91540802161. The reversal of 91540802160 is 6120804519.

91540802160 is a `hidden beast` number, since 91 + 5 + 408 + 0 + 2 + 160 = 666.

It is an interprime number because it is at equal distance from previous prime (91540802159) and next prime (91540802161).

It is a tau number, because it is divible by the number of its divisors (120).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91540802161) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2335005 + ... + 2373884.

It is an arithmetic number, because the mean of its divisors is an integer number (2656755738).

Almost surely, 2^91540802160 is an apocalyptic number.

91540802160 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is an amenable number.

91540802160 is an abundant number, since it is smaller than the sum of its proper divisors (227269886400).

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

91540802160 is a wasteful number, since it uses less digits than its factorization.

91540802160 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4708917 (or 4708899 counting only the distinct ones).

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

The spelling of 91540802160 in words is "ninety-one billion, five hundred forty million, eight hundred two thousand, one hundred sixty".