68222743991 has 2 divisors, whose sum is σ = 68222743992. Its totient is φ = 68222743990.

The previous prime is 68222743949. The next prime is 68222744017. The reversal of 68222743991 is 19934722286.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68222743991 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68222745991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34111371995 + 34111371996.

It is an arithmetic number, because the mean of its divisors is an integer number (34111371996).

Almost surely, 2^68222743991 is an apocalyptic number.

68222743991 is a deficient number, since it is larger than the sum of its proper divisors (1).

68222743991 is an equidigital number, since it uses as much as digits as its factorization.

68222743991 is an evil number, because the sum of its binary digits is even.

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

The spelling of 68222743991 in words is "sixty-eight billion, two hundred twenty-two million, seven hundred forty-three thousand, nine hundred ninety-one".