68556564 has 48 divisors (see below), whose sum is σ = 178295040. Its totient is φ = 22780800.

The previous prime is 68556517. The next prime is 68556569. The reversal of 68556564 is 46565586.

It is a happy number.

68556564 is a `hidden beast` number, since 6 + 85 + 5 + 6 + 564 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68556569) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 42517 + ... + 44099.

It is an arithmetic number, because the mean of its divisors is an integer number (3714480).

Almost surely, 2^68556564 is an apocalyptic number.

It is an amenable number.

68556564 is an abundant number, since it is smaller than the sum of its proper divisors (109738476).

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

68556564 is a wasteful number, since it uses less digits than its factorization.

68556564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1997 (or 1989 counting only the distinct ones).

The product of its digits is 864000, while the sum is 45.

The square root of 68556564 is about 8279.8891296925. The cubic root of 68556564 is about 409.2760653566.

The spelling of 68556564 in words is "sixty-eight million, five hundred fifty-six thousand, five hundred sixty-four".