164172642 has 16 divisors (see below), whose sum is σ = 328573152. Its totient is φ = 54686240.

The previous prime is 164172629. The next prime is 164172677. The reversal of 164172642 is 246271461.

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, 718 + ... + 18134.

It is an arithmetic number, because the mean of its divisors is an integer number (20535822).

Almost surely, 2^164172642 is an apocalyptic number.

164172642 is an abundant number, since it is smaller than the sum of its proper divisors (164400510).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

164172642 is a wasteful number, since it uses less digits than its factorization.

164172642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18993.

The product of its digits is 16128, while the sum is 33.

The square root of 164172642 is about 12812.9872395160. The cubic root of 164172642 is about 547.5623714936.

The spelling of 164172642 in words is "one hundred sixty-four million, one hundred seventy-two thousand, six hundred forty-two".