64017644 has 6 divisors (see below), whose sum is σ = 112030884. Its totient is φ = 32008820.

The previous prime is 64017643. The next prime is 64017649. The reversal of 64017644 is 44671046.

It is a self number, because there is not a number n which added to its sum of digits gives 64017644.

It is not an unprimeable number, because it can be changed into a prime (64017643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8002202 + ... + 8002209.

It is an arithmetic number, because the mean of its divisors is an integer number (18671814).

Almost surely, 2^64017644 is an apocalyptic number.

It is an amenable number.

64017644 is a deficient number, since it is larger than the sum of its proper divisors (48013240).

64017644 is a wasteful number, since it uses less digits than its factorization.

64017644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16004415 (or 16004413 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 32.

The square root of 64017644 is about 8001.1026740069. The cubic root of 64017644 is about 400.0367549559.

The spelling of 64017644 in words is "sixty-four million, seventeen thousand, six hundred forty-four".