68688564 has 24 divisors (see below), whose sum is σ = 183169728. Its totient is φ = 19625280.

The previous prime is 68688563. The next prime is 68688577. The reversal of 68688564 is 46588686.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68688563) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 408777 + ... + 408944.

It is an arithmetic number, because the mean of its divisors is an integer number (7632072).

Almost surely, 2^68688564 is an apocalyptic number.

It is an amenable number.

68688564 is an abundant number, since it is smaller than the sum of its proper divisors (114481164).

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

68688564 is a wasteful number, since it uses less digits than its factorization.

68688564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 817735 (or 817733 counting only the distinct ones).

The product of its digits is 2211840, while the sum is 51.

The square root of 68688564 is about 8287.8564176752. The cubic root of 68688564 is about 409.5385727000.

The spelling of 68688564 in words is "sixty-eight million, six hundred eighty-eight thousand, five hundred sixty-four".