68915862720 has 280 divisors, whose sum is σ = 245515485600. Its totient is φ = 18349867008.

The previous prime is 68915862703. The next prime is 68915862739. The reversal of 68915862720 is 2726851986.

68915862720 is a `hidden beast` number, since 6 + 8 + 9 + 1 + 5 + 8 + 627 + 2 + 0 = 666.

It is a super-2 number, since 2×68915862720² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 21745296 + ... + 21748464.

It is an arithmetic number, because the mean of its divisors is an integer number (876841020).

Almost surely, 2^68915862720 is an apocalyptic number.

68915862720 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 68915862720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (122757742800).

68915862720 is an abundant number, since it is smaller than the sum of its proper divisors (176599622880).

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

68915862720 is a wasteful number, since it uses less digits than its factorization.

68915862720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4037 (or 4018 counting only the distinct ones).

The product of its (nonzero) digits is 2903040, while the sum is 54.

The spelling of 68915862720 in words is "sixty-eight billion, nine hundred fifteen million, eight hundred sixty-two thousand, seven hundred twenty".