164572500 has 60 divisors (see below), whose sum is σ = 479871392. Its totient is φ = 43884000.

The previous prime is 164572487. The next prime is 164572511. The reversal of 164572500 is 5275461.

It is a tau number, because it is divible by the number of its divisors (60).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 3472 + ... + 18471.

Almost surely, 2^164572500 is an apocalyptic number.

164572500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

164572500 is an abundant number, since it is smaller than the sum of its proper divisors (315298892).

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

164572500 is a wasteful number, since it uses less digits than its factorization.

164572500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21970 (or 21953 counting only the distinct ones).

The product of its (nonzero) digits is 8400, while the sum is 30.

The square root of 164572500 is about 12828.5813712975. The cubic root of 164572500 is about 548.0065577207.

The spelling of 164572500 in words is "one hundred sixty-four million, five hundred seventy-two thousand, five hundred".