165891464 has 32 divisors (see below), whose sum is σ = 318305280. Its totient is φ = 81031104.

The previous prime is 165891449. The next prime is 165891497. The reversal of 165891464 is 464198561.

165891464 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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 7 ways as a sum of consecutive naturals, for example, 66854 + ... + 69290.

It is an arithmetic number, because the mean of its divisors is an integer number (9947040).

Almost surely, 2^165891464 is an apocalyptic number.

It is an amenable number.

165891464 is a deficient number, since it is larger than the sum of its proper divisors (152413816).

165891464 is a wasteful number, since it uses less digits than its factorization.

165891464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2637 (or 2633 counting only the distinct ones).

The product of its digits is 207360, while the sum is 44.

The square root of 165891464 is about 12879.8860243404. The cubic root of 165891464 is about 549.4666609458.

The spelling of 165891464 in words is "one hundred sixty-five million, eight hundred ninety-one thousand, four hundred sixty-four".