64505925 has 72 divisors (see below), whose sum is σ = 128250720. Its totient is φ = 30729600.

The previous prime is 64505923. The next prime is 64505927. The reversal of 64505925 is 52950546.

64505925 is a `hidden beast` number, since 64 + 5 + 0 + 592 + 5 = 666.

It is an interprime number because it is at equal distance from previous prime (64505923) and next prime (64505927).

It is not a de Polignac number, because 64505925 - 2¹ = 64505923 is a prime.

It is a super-2 number, since 2×64505925² = 8322028720211250, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 64505925.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64505923) 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 71 ways as a sum of consecutive naturals, for example, 165631 + ... + 166019.

It is an arithmetic number, because the mean of its divisors is an integer number (1781260).

Almost surely, 2^64505925 is an apocalyptic number.

It is an amenable number.

64505925 is a deficient number, since it is larger than the sum of its proper divisors (63744795).

64505925 is a wasteful number, since it uses less digits than its factorization.

64505925 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 483 (or 475 counting only the distinct ones).

The product of its (nonzero) digits is 54000, while the sum is 36.

The square root of 64505925 is about 8031.5580680214. The cubic root of 64505925 is about 401.0512452052.

The spelling of 64505925 in words is "sixty-four million, five hundred five thousand, nine hundred twenty-five".