164623765 has 8 divisors (see below), whose sum is σ = 206137728. Its totient is φ = 125972880.

The previous prime is 164623759. The next prime is 164623783. The reversal of 164623765 is 567326461.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 164623765 - 2⁹ = 164623253 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 715641 + ... + 715870.

It is an arithmetic number, because the mean of its divisors is an integer number (25767216).

Almost surely, 2^164623765 is an apocalyptic number.

It is an amenable number.

164623765 is a deficient number, since it is larger than the sum of its proper divisors (41513963).

164623765 is a wasteful number, since it uses less digits than its factorization.

164623765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1431539.

The product of its digits is 181440, while the sum is 40.

The square root of 164623765 is about 12830.5792932354. The cubic root of 164623765 is about 548.0634539004.

The spelling of 164623765 in words is "one hundred sixty-four million, six hundred twenty-three thousand, seven hundred sixty-five".