164355891 has 32 divisors (see below), whose sum is σ = 255897600. Its totient is φ = 91894176.

The previous prime is 164355859. The next prime is 164355913. The reversal of 164355891 is 198553461.

It is not a de Polignac number, because 164355891 - 2⁵ = 164355859 is a prime.

It is not an unprimeable number, because it can be changed into a prime (164355811) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 279700 + ... + 280286.

It is an arithmetic number, because the mean of its divisors is an integer number (7996800).

Almost surely, 2^164355891 is an apocalyptic number.

164355891 is a deficient number, since it is larger than the sum of its proper divisors (91541709).

164355891 is a wasteful number, since it uses less digits than its factorization.

164355891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 863.

The product of its digits is 129600, while the sum is 42.

The square root of 164355891 is about 12820.1361537232. The cubic root of 164355891 is about 547.7660248871.

The spelling of 164355891 in words is "one hundred sixty-four million, three hundred fifty-five thousand, eight hundred ninety-one".