863256407771 has 2 divisors, whose sum is σ = 863256407772. Its totient is φ = 863256407770.

The previous prime is 863256407719. The next prime is 863256407789. The reversal of 863256407771 is 177704652368.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-863256407771 is a prime.

It is not a weakly prime, because it can be changed into another prime (863256487771) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 431628203885 + 431628203886.

It is an arithmetic number, because the mean of its divisors is an integer number (431628203886).

Almost surely, 2^863256407771 is an apocalyptic number.

863256407771 is a deficient number, since it is larger than the sum of its proper divisors (1).

863256407771 is an equidigital number, since it uses as much as digits as its factorization.

863256407771 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11854080, while the sum is 56.

The spelling of 863256407771 in words is "eight hundred sixty-three billion, two hundred fifty-six million, four hundred seven thousand, seven hundred seventy-one".