68145960640 has 112 divisors (see below), whose sum is σ = 176462265312. Its totient is φ = 24961499136.

The previous prime is 68145960637. The next prime is 68145960667. The reversal of 68145960640 is 4606954186.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31999 + ... + 370561.

Almost surely, 2^68145960640 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 68145960640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (88231132656).

68145960640 is an abundant number, since it is smaller than the sum of its proper divisors (108316304672).

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

68145960640 is a wasteful number, since it uses less digits than its factorization.

68145960640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 338634 (or 338624 counting only the distinct ones).

The product of its (nonzero) digits is 1244160, while the sum is 49.

The spelling of 68145960640 in words is "sixty-eight billion, one hundred forty-five million, nine hundred sixty thousand, six hundred forty".