64188025 has 24 divisors (see below), whose sum is σ = 87726528. Its totient is φ = 46200000.

The previous prime is 64187999. The next prime is 64188139. The reversal of 64188025 is 52088146.

It is not a de Polignac number, because 64188025 - 2⁵ = 64187993 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 26620 + ... + 28930.

It is an arithmetic number, because the mean of its divisors is an integer number (3655272).

Almost surely, 2^64188025 is an apocalyptic number.

It is an amenable number.

64188025 is a deficient number, since it is larger than the sum of its proper divisors (23538503).

64188025 is a wasteful number, since it uses less digits than its factorization.

64188025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2433 (or 2428 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 34.

The square root of 64188025 is about 8011.7429439542. The cubic root of 64188025 is about 400.3913357659.

The spelling of 64188025 in words is "sixty-four million, one hundred eighty-eight thousand, twenty-five".