8256556241429 has 2 divisors, whose sum is σ = 8256556241430. Its totient is φ = 8256556241428.

The previous prime is 8256556241341. The next prime is 8256556241513. The reversal of 8256556241429 is 9241426556528.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7424137224529 + 832419016900 = 2724727^2 + 912370^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8256556241429 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8256556249429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4128278120714 + 4128278120715.

It is an arithmetic number, because the mean of its divisors is an integer number (4128278120715).

Almost surely, 2^{8256556241429} is an apocalyptic number.

It is an amenable number.

8256556241429 is a deficient number, since it is larger than the sum of its proper divisors (1).

8256556241429 is an equidigital number, since it uses as much as digits as its factorization.

8256556241429 is an evil number, because the sum of its binary digits is even.

The product of its digits is 41472000, while the sum is 59.

The spelling of 8256556241429 in words is "eight trillion, two hundred fifty-six billion, five hundred fifty-six million, two hundred forty-one thousand, four hundred twenty-nine".