64944425 has 24 divisors (see below), whose sum is σ = 99118656. Its totient is φ = 41106240.

The previous prime is 64944419. The next prime is 64944449. The reversal of 64944425 is 52444946.

It is not a de Polignac number, because 64944425 - 2⁴ = 64944409 is a prime.

It is a Curzon 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 23 ways as a sum of consecutive naturals, for example, 11999 + ... + 16548.

It is an arithmetic number, because the mean of its divisors is an integer number (4129944).

Almost surely, 2^64944425 is an apocalyptic number.

64944425 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

64944425 is a deficient number, since it is larger than the sum of its proper divisors (34174231).

64944425 is a wasteful number, since it uses less digits than its factorization.

64944425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28577 (or 28572 counting only the distinct ones).

The product of its digits is 138240, while the sum is 38.

The square root of 64944425 is about 8058.8103960820. The cubic root of 64944425 is about 401.9579525009.

The spelling of 64944425 in words is "sixty-four million, nine hundred forty-four thousand, four hundred twenty-five".