68131628472 has 64 divisors (see below), whose sum is σ = 173815644960. Its totient is φ = 22247014400.

The previous prime is 68131628449. The next prime is 68131628473. The reversal of 68131628472 is 27482613186.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68131628473) 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, 773572 + ... + 857132.

Almost surely, 2^68131628472 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 68131628472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (86907822480).

68131628472 is an abundant number, since it is smaller than the sum of its proper divisors (105684016488).

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

68131628472 is a wasteful number, since it uses less digits than its factorization.

68131628472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84264 (or 84260 counting only the distinct ones).

The product of its digits is 774144, while the sum is 48.

The spelling of 68131628472 in words is "sixty-eight billion, one hundred thirty-one million, six hundred twenty-eight thousand, four hundred seventy-two".