64556144 has 10 divisors (see below), whose sum is σ = 125077560. Its totient is φ = 32278064.

The previous prime is 64556143. The next prime is 64556159. The reversal of 64556144 is 44165546.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64556143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2017364 + ... + 2017395.

It is an arithmetic number, because the mean of its divisors is an integer number (12507756).

Almost surely, 2^64556144 is an apocalyptic number.

It is an amenable number.

64556144 is a deficient number, since it is larger than the sum of its proper divisors (60521416).

64556144 is a wasteful number, since it uses less digits than its factorization.

64556144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4034767 (or 4034761 counting only the distinct ones).

The product of its digits is 57600, while the sum is 35.

The square root of 64556144 is about 8034.6838145630. The cubic root of 64556144 is about 401.1552933640.

The spelling of 64556144 in words is "sixty-four million, five hundred fifty-six thousand, one hundred forty-four".