64814825 has 6 divisors (see below), whose sum is σ = 80370414. Its totient is φ = 51851840.

The previous prime is 64814819. The next prime is 64814899. The reversal of 64814825 is 52841846.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 44521 + 64770304 = 211^2 + 8048^2 .

It is not a de Polignac number, because 64814825 - 2⁸ = 64814569 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1296272 + ... + 1296321.

It is an arithmetic number, because the mean of its divisors is an integer number (13395069).

Almost surely, 2^64814825 is an apocalyptic number.

It is an amenable number.

64814825 is a deficient number, since it is larger than the sum of its proper divisors (15555589).

64814825 is a wasteful number, since it uses less digits than its factorization.

64814825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2592603 (or 2592598 counting only the distinct ones).

The product of its digits is 61440, while the sum is 38.

The square root of 64814825 is about 8050.7654915542. The cubic root of 64814825 is about 401.6903984035.

The spelling of 64814825 in words is "sixty-four million, eight hundred fourteen thousand, eight hundred twenty-five".