64635025 has 24 divisors (see below), whose sum is σ = 98646464. Its totient is φ = 40910400.

The previous prime is 64634987. The next prime is 64635061. The reversal of 64635025 is 52053646.

It is not a de Polignac number, because 64635025 - 2¹⁹ = 64110737 is a prime.

It is an unprimeable number.

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, 11931 + ... + 16480.

Almost surely, 2^64635025 is an apocalyptic number.

64635025 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

64635025 is a deficient number, since it is larger than the sum of its proper divisors (34011439).

64635025 is a wasteful number, since it uses less digits than its factorization.

64635025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28441 (or 28436 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 31.

The square root of 64635025 is about 8039.5910965670. The cubic root of 64635025 is about 401.3186170958.

The spelling of 64635025 in words is "sixty-four million, six hundred thirty-five thousand, twenty-five".