68177486728 has 64 divisors (see below), whose sum is σ = 141056213760. Its totient is φ = 30696039936.

The previous prime is 68177486659. The next prime is 68177486759. The reversal of 68177486728 is 82768477186.

It is a super-2 number, since 2×68177486728² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 68177486728.

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, 1477900 + ... + 1523332.

It is an arithmetic number, because the mean of its divisors is an integer number (2204003340).

Almost surely, 2^68177486728 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 68177486728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (70528106880).

68177486728 is an abundant number, since it is smaller than the sum of its proper divisors (72878727032).

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

68177486728 is a wasteful number, since it uses less digits than its factorization.

68177486728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45806 (or 45802 counting only the distinct ones).

The product of its digits is 50577408, while the sum is 64.

The spelling of 68177486728 in words is "sixty-eight billion, one hundred seventy-seven million, four hundred eighty-six thousand, seven hundred twenty-eight".