64315644 has 24 divisors (see below), whose sum is σ = 150482640. Its totient is φ = 21379584.

The previous prime is 64315637. The next prime is 64315651. The reversal of 64315644 is 44651346.

It is an interprime number because it is at equal distance from previous prime (64315637) and next prime (64315651).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2709 + ... + 11660.

It is an arithmetic number, because the mean of its divisors is an integer number (6270110).

Almost surely, 2^64315644 is an apocalyptic number.

It is an amenable number.

64315644 is an abundant number, since it is smaller than the sum of its proper divisors (86166996).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

64315644 is a wasteful number, since it uses less digits than its factorization.

64315644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14749 (or 14747 counting only the distinct ones).

The product of its digits is 34560, while the sum is 33.

The square root of 64315644 is about 8019.7034857905. The cubic root of 64315644 is about 400.6565135520.

The spelling of 64315644 in words is "sixty-four million, three hundred fifteen thousand, six hundred forty-four".