68644568832 has 432 divisors, whose sum is σ = 219042496512. Its totient is φ = 19020718080.

The previous prime is 68644568809. The next prime is 68644568849. The reversal of 68644568832 is 23886544686.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 253300857 + ... + 253301127.

It is an arithmetic number, because the mean of its divisors is an integer number (507042816).

Almost surely, 2^68644568832 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 68644568832, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (109521248256).

68644568832 is an abundant number, since it is smaller than the sum of its proper divisors (150397927680).

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

68644568832 is a wasteful number, since it uses less digits than its factorization.

68644568832 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 484 (or 463 counting only the distinct ones).

The product of its digits is 53084160, while the sum is 60.

The spelling of 68644568832 in words is "sixty-eight billion, six hundred forty-four million, five hundred sixty-eight thousand, eight hundred thirty-two".