164885638 has 8 divisors (see below), whose sum is σ = 247494600. Its totient is φ = 82387440.

The previous prime is 164885627. The next prime is 164885659. The reversal of 164885638 is 836588461.

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

It is a junction number, because it is equal to n+sod(n) for n = 164885591 and 164885600.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23863 + ... + 29986.

It is an arithmetic number, because the mean of its divisors is an integer number (30936825).

Almost surely, 2^164885638 is an apocalyptic number.

164885638 is a deficient number, since it is larger than the sum of its proper divisors (82608962).

164885638 is a wasteful number, since it uses less digits than its factorization.

164885638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55382.

The product of its digits is 1105920, while the sum is 49.

The square root of 164885638 is about 12840.7802722420. The cubic root of 164885638 is about 548.3539080877.

The spelling of 164885638 in words is "one hundred sixty-four million, eight hundred eighty-five thousand, six hundred thirty-eight".