64450625 has 20 divisors (see below), whose sum is σ = 81414564. Its totient is φ = 51000000.

The previous prime is 64450609. The next prime is 64450637. The reversal of 64450625 is 52605446.

64450625 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 10 ways, for example, as 28976689 + 35473936 = 5383^2 + 5956^2 .

It is not a de Polignac number, because 64450625 - 2⁴ = 64450609 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 64450591 and 64450600.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 62615 + ... + 63635.

Almost surely, 2^64450625 is an apocalyptic number.

It is an amenable number.

64450625 is a deficient number, since it is larger than the sum of its proper divisors (16963939).

64450625 is a wasteful number, since it uses less digits than its factorization.

64450625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1142 (or 1127 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 32.

The square root of 64450625 is about 8028.1146603670. The cubic root of 64450625 is about 400.9366072886.

The spelling of 64450625 in words is "sixty-four million, four hundred fifty thousand, six hundred twenty-five".