68249965056 has 640 divisors, whose sum is σ = 243451084800. Its totient is φ = 16482631680.

The previous prime is 68249965051. The next prime is 68249965057. The reversal of 68249965056 is 65056994286.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (68249965051) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 82327650 + ... + 82328478.

It is an arithmetic number, because the mean of its divisors is an integer number (380392320).

Almost surely, 2^68249965056 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 68249965056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (121725542400).

68249965056 is an abundant number, since it is smaller than the sum of its proper divisors (175201119744).

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

68249965056 is a wasteful number, since it uses less digits than its factorization.

68249965056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 920 (or 904 counting only the distinct ones).

The product of its (nonzero) digits is 27993600, while the sum is 60.

The spelling of 68249965056 in words is "sixty-eight billion, two hundred forty-nine million, nine hundred sixty-five thousand, fifty-six".