68718924288 has 640 divisors, whose sum is σ = 253023091200. Its totient is φ = 17963679744.

The previous prime is 68718924277. The next prime is 68718924299. The reversal of 68718924288 is 88242981786.

68718924288 is a `hidden beast` number, since 68 + 71 + 89 + 2 + 428 + 8 = 666.

It is an interprime number because it is at equal distance from previous prime (68718924277) and next prime (68718924299).

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 60866508 + ... + 60867636.

It is an arithmetic number, because the mean of its divisors is an integer number (395348580).

Almost surely, 2^68718924288 is an apocalyptic number.

68718924288 is a gapful number since it is divisible by the number (68) 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 68718924288, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (126511545600).

68718924288 is an abundant number, since it is smaller than the sum of its proper divisors (184304166912).

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

68718924288 is a wasteful number, since it uses less digits than its factorization.

68718924288 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1217 (or 1195 counting only the distinct ones).

The product of its digits is 24772608, while the sum is 63.

The spelling of 68718924288 in words is "sixty-eight billion, seven hundred eighteen million, nine hundred twenty-four thousand, two hundred eighty-eight".