64718825 has 6 divisors (see below), whose sum is σ = 80251374. Its totient is φ = 51775040.

The previous prime is 64718783. The next prime is 64718831. The reversal of 64718825 is 52881746.

It can be written as a sum of positive squares in 3 ways, for example, as 14776336 + 49942489 = 3844^2 + 7067^2 .

It is not a de Polignac number, because 64718825 - 2¹⁴ = 64702441 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1294352 + ... + 1294401.

It is an arithmetic number, because the mean of its divisors is an integer number (13375229).

Almost surely, 2^64718825 is an apocalyptic number.

It is an amenable number.

64718825 is a deficient number, since it is larger than the sum of its proper divisors (15532549).

64718825 is a wasteful number, since it uses less digits than its factorization.

64718825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2588763 (or 2588758 counting only the distinct ones).

The product of its digits is 107520, while the sum is 41.

The square root of 64718825 is about 8044.8011162489. The cubic root of 64718825 is about 401.4919801523.

The spelling of 64718825 in words is "sixty-four million, seven hundred eighteen thousand, eight hundred twenty-five".