64868564 has 6 divisors (see below), whose sum is σ = 113519994. Its totient is φ = 32434280.

The previous prime is 64868561. The next prime is 64868581. The reversal of 64868564 is 46586846.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 52562500 + 12306064 = 7250^2 + 3508^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64868561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8108567 + ... + 8108574.

It is an arithmetic number, because the mean of its divisors is an integer number (18919999).

Almost surely, 2^64868564 is an apocalyptic number.

It is an amenable number.

64868564 is a deficient number, since it is larger than the sum of its proper divisors (48651430).

64868564 is a wasteful number, since it uses less digits than its factorization.

64868564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16217145 (or 16217143 counting only the distinct ones).

The product of its digits is 1105920, while the sum is 47.

The square root of 64868564 is about 8054.1023087617. The cubic root of 64868564 is about 401.8013836972.

The spelling of 64868564 in words is "sixty-four million, eight hundred sixty-eight thousand, five hundred sixty-four".