64506625 has 8 divisors (see below), whose sum is σ = 80504424. Its totient is φ = 51605200.

The previous prime is 64506623. The next prime is 64506677. The reversal of 64506625 is 52660546.

It can be written as a sum of positive squares in 4 ways, for example, as 1399489 + 63107136 = 1183^2 + 7944^2 .

It is not a de Polignac number, because 64506625 - 2¹ = 64506623 is a prime.

It is a super-2 number, since 2×64506625² = 8322209337781250, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64506623) 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 7 ways as a sum of consecutive naturals, for example, 257902 + ... + 258151.

It is an arithmetic number, because the mean of its divisors is an integer number (10063053).

Almost surely, 2^64506625 is an apocalyptic number.

It is an amenable number.

64506625 is a deficient number, since it is larger than the sum of its proper divisors (15997799).

64506625 is an equidigital number, since it uses as much as digits as its factorization.

64506625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 516068 (or 516058 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 34.

The square root of 64506625 is about 8031.6016459981. The cubic root of 64506625 is about 401.0526958980.

The spelling of 64506625 in words is "sixty-four million, five hundred six thousand, six hundred twenty-five".