68727872771 has 2 divisors, whose sum is σ = 68727872772. Its totient is φ = 68727872770.

The previous prime is 68727872713. The next prime is 68727872827. The reversal of 68727872771 is 17727872786.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68727872771 is a prime.

It is not a weakly prime, because it can be changed into another prime (68727872471) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34363936385 + 34363936386.

It is an arithmetic number, because the mean of its divisors is an integer number (34363936386).

Almost surely, 2^68727872771 is an apocalyptic number.

68727872771 is a deficient number, since it is larger than the sum of its proper divisors (1).

68727872771 is an equidigital number, since it uses as much as digits as its factorization.

68727872771 is an evil number, because the sum of its binary digits is even.

The product of its digits is 25815552, while the sum is 62.

The spelling of 68727872771 in words is "sixty-eight billion, seven hundred twenty-seven million, eight hundred seventy-two thousand, seven hundred seventy-one".