68621564 has 12 divisors (see below), whose sum is σ = 131004888. Its totient is φ = 31191600.

The previous prime is 68621563. The next prime is 68621621. The reversal of 68621564 is 46512686.

It is a hoax number, since the sum of its digits (38) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68621563) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 779747 + ... + 779834.

It is an arithmetic number, because the mean of its divisors is an integer number (10917074).

Almost surely, 2^68621564 is an apocalyptic number.

It is an amenable number.

68621564 is a deficient number, since it is larger than the sum of its proper divisors (62383324).

68621564 is a wasteful number, since it uses less digits than its factorization.

68621564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1559596 (or 1559594 counting only the distinct ones).

The product of its digits is 69120, while the sum is 38.

The square root of 68621564 is about 8283.8133730789. The cubic root of 68621564 is about 409.4053724061.

The spelling of 68621564 in words is "sixty-eight million, six hundred twenty-one thousand, five hundred sixty-four".