8256556499 has 2 divisors, whose sum is σ = 8256556500. Its totient is φ = 8256556498.

The previous prime is 8256556489. The next prime is 8256556543. The reversal of 8256556499 is 9946556528.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8256556499 is a prime.

It is a super-3 number, since 3×8256556499³ (a number of 31 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (8256556439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4128278249 + 4128278250.

It is an arithmetic number, because the mean of its divisors is an integer number (4128278250).

Almost surely, 2^8256556499 is an apocalyptic number.

8256556499 is a deficient number, since it is larger than the sum of its proper divisors (1).

8256556499 is an equidigital number, since it uses as much as digits as its factorization.

8256556499 is an evil number, because the sum of its binary digits is even.

The product of its digits is 23328000, while the sum is 59.

The square root of 8256556499 is about 90865.5957940078. The cubic root of 8256556499 is about 2021.1551491014.

The spelling of 8256556499 in words is "eight billion, two hundred fifty-six million, five hundred fifty-six thousand, four hundred ninety-nine".