68631564 has 12 divisors (see below), whose sum is σ = 160140344. Its totient is φ = 22877184.

The previous prime is 68631539. The next prime is 68631571. The reversal of 68631564 is 46513686.

It is a tau number, because it is divible by the number of its divisors (12).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2859637 + ... + 2859660.

Almost surely, 2^68631564 is an apocalyptic number.

It is an amenable number.

68631564 is an abundant number, since it is smaller than the sum of its proper divisors (91508780).

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

68631564 is a wasteful number, since it uses less digits than its factorization.

68631564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5719304 (or 5719302 counting only the distinct ones).

The product of its digits is 103680, while the sum is 39.

The square root of 68631564 is about 8284.4169378418. The cubic root of 68631564 is about 409.4252585499.

The spelling of 68631564 in words is "sixty-eight million, six hundred thirty-one thousand, five hundred sixty-four".