91810164 has 12 divisors (see below), whose sum is σ = 214223744. Its totient is φ = 30603384.

The previous prime is 91810163. The next prime is 91810219. The reversal of 91810164 is 46101819.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91810163) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3825412 + ... + 3825435.

Almost surely, 2^91810164 is an apocalyptic number.

It is an amenable number.

91810164 is an abundant number, since it is smaller than the sum of its proper divisors (122413580).

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

91810164 is a wasteful number, since it uses less digits than its factorization.

91810164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7650854 (or 7650852 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 30.

The square root of 91810164 is about 9581.7620508965. The cubic root of 91810164 is about 451.1250269964.

The spelling of 91810164 in words is "ninety-one million, eight hundred ten thousand, one hundred sixty-four".