86256343777 has 2 divisors, whose sum is σ = 86256343778. Its totient is φ = 86256343776.

The previous prime is 86256343739. The next prime is 86256343781. The reversal of 86256343777 is 77734365268.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 78633133056 + 7623210721 = 280416^2 + 87311^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-86256343777 is a prime.

It is not a weakly prime, because it can be changed into another prime (86256343477) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43128171888 + 43128171889.

It is an arithmetic number, because the mean of its divisors is an integer number (43128171889).

Almost surely, 2^86256343777 is an apocalyptic number.

It is an amenable number.

86256343777 is a deficient number, since it is larger than the sum of its proper divisors (1).

86256343777 is an equidigital number, since it uses as much as digits as its factorization.

86256343777 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 35562240, while the sum is 58.

The spelling of 86256343777 in words is "eighty-six billion, two hundred fifty-six million, three hundred forty-three thousand, seven hundred seventy-seven".