68780814331 has 2 divisors, whose sum is σ = 68780814332. Its totient is φ = 68780814330.

The previous prime is 68780814287. The next prime is 68780814341. The reversal of 68780814331 is 13341808786.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 68780814331 - 2²⁵ = 68747259899 is a prime.

It is a super-2 number, since 2×68780814331² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (68780814341) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34390407165 + 34390407166.

It is an arithmetic number, because the mean of its divisors is an integer number (34390407166).

Almost surely, 2^68780814331 is an apocalyptic number.

68780814331 is a deficient number, since it is larger than the sum of its proper divisors (1).

68780814331 is an equidigital number, since it uses as much as digits as its factorization.

68780814331 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 774144, while the sum is 49.

The spelling of 68780814331 in words is "sixty-eight billion, seven hundred eighty million, eight hundred fourteen thousand, three hundred thirty-one".