64638572 has 6 divisors (see below), whose sum is σ = 113117508. Its totient is φ = 32319284.

The previous prime is 64638559. The next prime is 64638601. The reversal of 64638572 is 27583646.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8079818 + ... + 8079825.

It is an arithmetic number, because the mean of its divisors is an integer number (18852918).

Almost surely, 2^64638572 is an apocalyptic number.

It is an amenable number.

64638572 is a deficient number, since it is larger than the sum of its proper divisors (48478936).

64638572 is a wasteful number, since it uses less digits than its factorization.

64638572 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16159647 (or 16159645 counting only the distinct ones).

The product of its digits is 241920, while the sum is 41.

The square root of 64638572 is about 8039.8116893370. The cubic root of 64638572 is about 401.3259580646.

The spelling of 64638572 in words is "sixty-four million, six hundred thirty-eight thousand, five hundred seventy-two".