64397644 has 6 divisors (see below), whose sum is σ = 112695884. Its totient is φ = 32198820.

The previous prime is 64397623. The next prime is 64397647. The reversal of 64397644 is 44679346.

64397644 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 64397644.

It is not an unprimeable number, because it can be changed into a prime (64397647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8049702 + ... + 8049709.

Almost surely, 2^64397644 is an apocalyptic number.

It is an amenable number.

64397644 is a deficient number, since it is larger than the sum of its proper divisors (48298240).

64397644 is a wasteful number, since it uses less digits than its factorization.

64397644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16099415 (or 16099413 counting only the distinct ones).

The product of its digits is 435456, while the sum is 43.

The square root of 64397644 is about 8024.8142657634. The cubic root of 64397644 is about 400.8267151779.

The spelling of 64397644 in words is "sixty-four million, three hundred ninety-seven thousand, six hundred forty-four".