64988564 has 6 divisors (see below), whose sum is σ = 113729994. Its totient is φ = 32494280.

The previous prime is 64988563. The next prime is 64988579. The reversal of 64988564 is 46588946.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 64963600 + 24964 = 8060^2 + 158^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64988563) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8123567 + ... + 8123574.

It is an arithmetic number, because the mean of its divisors is an integer number (18954999).

Almost surely, 2^64988564 is an apocalyptic number.

It is an amenable number.

64988564 is a deficient number, since it is larger than the sum of its proper divisors (48741430).

64988564 is a wasteful number, since it uses less digits than its factorization.

64988564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16247145 (or 16247143 counting only the distinct ones).

The product of its digits is 1658880, while the sum is 50.

The square root of 64988564 is about 8061.5484864882. The cubic root of 64988564 is about 402.0489944658.

The spelling of 64988564 in words is "sixty-four million, nine hundred eighty-eight thousand, five hundred sixty-four".