64988568 has 40 divisors (see below), whose sum is σ = 182029980. Its totient is φ = 21662640.

The previous prime is 64988563. The next prime is 64988579. The reversal of 64988568 is 86588946.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (54).

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 in 9 ways as a sum of consecutive naturals, for example, 49498 + ... + 50793.

Almost surely, 2^64988568 is an apocalyptic number.

It is an amenable number.

64988568 is an abundant number, since it is smaller than the sum of its proper divisors (117041412).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

64988568 is a wasteful number, since it uses less digits than its factorization.

64988568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100309 (or 100296 counting only the distinct ones).

The product of its digits is 3317760, while the sum is 54.

The square root of 64988568 is about 8061.5487345795. The cubic root of 64988568 is about 402.0490027144.

It can be divided in two parts, 64988 and 568, that added together give a palindrome (65556).

The spelling of 64988568 in words is "sixty-four million, nine hundred eighty-eight thousand, five hundred sixty-eight".