164123615 has 32 divisors (see below), whose sum is σ = 219844800. Its totient is φ = 117089280.

The previous prime is 164123591. The next prime is 164123639. The reversal of 164123615 is 516321461.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (164123591) and next prime (164123639).

It is not a de Polignac number, because 164123615 - 2⁸ = 164123359 is a prime.

It is a super-2 number, since 2×164123615² = 53873122001336450, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 112229 + ... + 113681.

It is an arithmetic number, because the mean of its divisors is an integer number (6870150).

Almost surely, 2^164123615 is an apocalyptic number.

164123615 is a deficient number, since it is larger than the sum of its proper divisors (55721185).

164123615 is a wasteful number, since it uses less digits than its factorization.

164123615 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1547.

The product of its digits is 4320, while the sum is 29.

The square root of 164123615 is about 12811.0739206360. The cubic root of 164123615 is about 547.5078597455.

The spelling of 164123615 in words is "one hundred sixty-four million, one hundred twenty-three thousand, six hundred fifteen".