68680279313 has 2 divisors, whose sum is σ = 68680279314. Its totient is φ = 68680279312.

The previous prime is 68680279309. The next prime is 68680279391. The reversal of 68680279313 is 31397208686.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 40211478784 + 28468800529 = 200528^2 + 168727^2 .

It is a cyclic number.

It is not a de Polignac number, because 68680279313 - 2² = 68680279309 is a prime.

It is not a weakly prime, because it can be changed into another prime (68680279303) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34340139656 + 34340139657.

It is an arithmetic number, because the mean of its divisors is an integer number (34340139657).

Almost surely, 2^68680279313 is an apocalyptic number.

It is an amenable number.

68680279313 is a deficient number, since it is larger than the sum of its proper divisors (1).

68680279313 is an equidigital number, since it uses as much as digits as its factorization.

68680279313 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2612736, while the sum is 53.

The spelling of 68680279313 in words is "sixty-eight billion, six hundred eighty million, two hundred seventy-nine thousand, three hundred thirteen".