68239244664 has 64 divisors (see below), whose sum is σ = 189991485600. Its totient is φ = 22693851648.

The previous prime is 68239244657. The next prime is 68239244669. The reversal of 68239244664 is 46644293286.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 68239244664.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68239244669) 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, 271279 + ... + 458334.

Almost surely, 2^68239244664 is an apocalyptic number.

It is an amenable number.

68239244664 is an abundant number, since it is smaller than the sum of its proper divisors (121752240936).

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

68239244664 is a wasteful number, since it uses less digits than its factorization.

68239244664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 730061 (or 730051 counting only the distinct ones).

The product of its digits is 11943936, while the sum is 54.

The spelling of 68239244664 in words is "sixty-eight billion, two hundred thirty-nine million, two hundred forty-four thousand, six hundred sixty-four".