68146807331 has 2 divisors, whose sum is σ = 68146807332. Its totient is φ = 68146807330.

The previous prime is 68146807271. The next prime is 68146807343. The reversal of 68146807331 is 13370864186.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 68146807331 - 2²² = 68142613027 is a prime.

It is a super-2 number, since 2×68146807331² (a number of 22 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (68146807231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34073403665 + 34073403666.

It is an arithmetic number, because the mean of its divisors is an integer number (34073403666).

Almost surely, 2^68146807331 is an apocalyptic number.

68146807331 is a deficient number, since it is larger than the sum of its proper divisors (1).

68146807331 is an equidigital number, since it uses as much as digits as its factorization.

68146807331 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 580608, while the sum is 47.

The spelling of 68146807331 in words is "sixty-eight billion, one hundred forty-six million, eight hundred seven thousand, three hundred thirty-one".