64653825 has 24 divisors (see below), whose sum is σ = 107322496. Its totient is φ = 34344000.

The previous prime is 64653803. The next prime is 64653829. The reversal of 64653825 is 52835646.

It is not a de Polignac number, because 64653825 - 2¹⁵ = 64621057 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64653829) 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, 18735 + ... + 21915.

Almost surely, 2^64653825 is an apocalyptic number.

It is an amenable number.

64653825 is a deficient number, since it is larger than the sum of its proper divisors (42668671).

64653825 is a wasteful number, since it uses less digits than its factorization.

64653825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3465 (or 3460 counting only the distinct ones).

The product of its digits is 172800, while the sum is 39.

The square root of 64653825 is about 8040.7602252523. The cubic root of 64653825 is about 401.3575230328.

The spelling of 64653825 in words is "sixty-four million, six hundred fifty-three thousand, eight hundred twenty-five".