68645386231 has 2 divisors, whose sum is σ = 68645386232. Its totient is φ = 68645386230.

The previous prime is 68645386219. The next prime is 68645386237. The reversal of 68645386231 is 13268354686.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68645386231 is a prime.

It is a super-2 number, since 2×68645386231² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68645386237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34322693115 + 34322693116.

It is an arithmetic number, because the mean of its divisors is an integer number (34322693116).

Almost surely, 2^68645386231 is an apocalyptic number.

68645386231 is a deficient number, since it is larger than the sum of its proper divisors (1).

68645386231 is an equidigital number, since it uses as much as digits as its factorization.

68645386231 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4976640, while the sum is 52.

The spelling of 68645386231 in words is "sixty-eight billion, six hundred forty-five million, three hundred eighty-six thousand, two hundred thirty-one".