91165740 has 48 divisors (see below), whose sum is σ = 255709440. Its totient is φ = 24268480.

The previous prime is 91165727. The next prime is 91165769. The reversal of 91165740 is 4756119.

It is a super-2 number, since 2×91165740² = 16622384299495200, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 49435 + ... + 51245.

It is an arithmetic number, because the mean of its divisors is an integer number (5327280).

Almost surely, 2^91165740 is an apocalyptic number.

It is an amenable number.

91165740 is an abundant number, since it is smaller than the sum of its proper divisors (164543700).

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

91165740 is a wasteful number, since it uses less digits than its factorization.

91165740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2662 (or 2660 counting only the distinct ones).

The product of its (nonzero) digits is 7560, while the sum is 33.

The square root of 91165740 is about 9548.0751986984. The cubic root of 91165740 is about 450.0670517369.

The spelling of 91165740 in words is "ninety-one million, one hundred sixty-five thousand, seven hundred forty".