68816508751 has 2 divisors, whose sum is σ = 68816508752. Its totient is φ = 68816508750.

The previous prime is 68816508721. The next prime is 68816508781. The reversal of 68816508751 is 15780561886.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (68816508721) and next prime (68816508781).

It is a cyclic number.

It is not a de Polignac number, because 68816508751 - 2³³ = 60226574159 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 68816508692 and 68816508701.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68816508721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34408254375 + 34408254376.

It is an arithmetic number, because the mean of its divisors is an integer number (34408254376).

Almost surely, 2^68816508751 is an apocalyptic number.

68816508751 is a deficient number, since it is larger than the sum of its proper divisors (1).

68816508751 is an equidigital number, since it uses as much as digits as its factorization.

68816508751 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3225600, while the sum is 55.

The spelling of 68816508751 in words is "sixty-eight billion, eight hundred sixteen million, five hundred eight thousand, seven hundred fifty-one".