68537644 has 12 divisors (see below), whose sum is σ = 137075344. Its totient is φ = 29373264.

The previous prime is 68537633. The next prime is 68537663. The reversal of 68537644 is 44673586.

68537644 is an admirable number.

It is a hoax number, since the sum of its digits (43) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 68537644.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1223859 + ... + 1223914.

Almost surely, 2^68537644 is an apocalyptic number.

It is an amenable number.

68537644 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

68537644 is a wasteful number, since it uses less digits than its factorization.

68537644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2447784 (or 2447782 counting only the distinct ones).

The product of its digits is 483840, while the sum is 43.

The square root of 68537644 is about 8278.7465234781. The cubic root of 68537644 is about 409.2384117017.

The spelling of 68537644 in words is "sixty-eight million, five hundred thirty-seven thousand, six hundred forty-four".