164353725 has 24 divisors (see below), whose sum is σ = 301925120. Its totient is φ = 87654960.

The previous prime is 164353681. The next prime is 164353727. The reversal of 164353725 is 527353461.

164353725 is a `hidden beast` number, since 1 + 643 + 5 + 3 + 7 + 2 + 5 = 666.

It is not a de Polignac number, because 164353725 - 2⁹ = 164353213 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 164353725.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (164353727) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 121069 + ... + 122418.

Almost surely, 2^164353725 is an apocalyptic number.

164353725 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

164353725 is a deficient number, since it is larger than the sum of its proper divisors (137571395).

164353725 is a wasteful number, since it uses less digits than its factorization.

164353725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 243506 (or 243495 counting only the distinct ones).

The product of its digits is 75600, while the sum is 36.

The square root of 164353725 is about 12820.0516769629. The cubic root of 164353725 is about 547.7636185918.

The spelling of 164353725 in words is "one hundred sixty-four million, three hundred fifty-three thousand, seven hundred twenty-five".