164636425 has 24 divisors (see below), whose sum is σ = 215784800. Its totient is φ = 124260480.

The previous prime is 164636399. The next prime is 164636429. The reversal of 164636425 is 524636461.

It is not a de Polignac number, because 164636425 - 2²⁷ = 30418697 is a prime.

It is not an unprimeable number, because it can be changed into a prime (164636429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 145261 + ... + 146389.

Almost surely, 2^164636425 is an apocalyptic number.

It is an amenable number.

164636425 is a deficient number, since it is larger than the sum of its proper divisors (51148375).

164636425 is a wasteful number, since it uses less digits than its factorization.

164636425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1465 (or 1460 counting only the distinct ones).

The product of its digits is 103680, while the sum is 37.

The square root of 164636425 is about 12831.0726363777. The cubic root of 164636425 is about 548.0775027134.

The spelling of 164636425 in words is "one hundred sixty-four million, six hundred thirty-six thousand, four hundred twenty-five".