68291254709 has 2 divisors, whose sum is σ = 68291254710. Its totient is φ = 68291254708.

The previous prime is 68291254547. The next prime is 68291254751. The reversal of 68291254709 is 90745219286.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 48643625809 + 19647628900 = 220553^2 + 140170^2 .

It is a cyclic number.

It is not a de Polignac number, because 68291254709 - 2⁸ = 68291254453 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68291254769) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34145627354 + 34145627355.

It is an arithmetic number, because the mean of its divisors is an integer number (34145627355).

Almost surely, 2^68291254709 is an apocalyptic number.

It is an amenable number.

68291254709 is a deficient number, since it is larger than the sum of its proper divisors (1).

68291254709 is an equidigital number, since it uses as much as digits as its factorization.

68291254709 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2177280, while the sum is 53.

The spelling of 68291254709 in words is "sixty-eight billion, two hundred ninety-one million, two hundred fifty-four thousand, seven hundred nine".