68156277247 has 2 divisors, whose sum is σ = 68156277248. Its totient is φ = 68156277246.

The previous prime is 68156277191. The next prime is 68156277251. The reversal of 68156277247 is 74277265186.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68156277247 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68156977247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34078138623 + 34078138624.

It is an arithmetic number, because the mean of its divisors is an integer number (34078138624).

Almost surely, 2^68156277247 is an apocalyptic number.

68156277247 is a deficient number, since it is larger than the sum of its proper divisors (1).

68156277247 is an equidigital number, since it uses as much as digits as its factorization.

68156277247 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7902720, while the sum is 55.

The spelling of 68156277247 in words is "sixty-eight billion, one hundred fifty-six million, two hundred seventy-seven thousand, two hundred forty-seven".