68214999757 has 2 divisors, whose sum is σ = 68214999758. Its totient is φ = 68214999756.

The previous prime is 68214999707. The next prime is 68214999773. The reversal of 68214999757 is 75799941286.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 57175504996 + 11039494761 = 239114^2 + 105069^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68214999757 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 68214999692 and 68214999701.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68214999707) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34107499878 + 34107499879.

It is an arithmetic number, because the mean of its divisors is an integer number (34107499879).

Almost surely, 2^68214999757 is an apocalyptic number.

It is an amenable number.

68214999757 is a deficient number, since it is larger than the sum of its proper divisors (1).

68214999757 is an equidigital number, since it uses as much as digits as its factorization.

68214999757 is an evil number, because the sum of its binary digits is even.

The product of its digits is 68584320, while the sum is 67.

The spelling of 68214999757 in words is "sixty-eight billion, two hundred fourteen million, nine hundred ninety-nine thousand, seven hundred fifty-seven".