8256556543 has 2 divisors, whose sum is σ = 8256556544. Its totient is φ = 8256556542.

The previous prime is 8256556499. The next prime is 8256556579. The reversal of 8256556543 is 3456556528.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 8256556543 - 2¹³ = 8256548351 is a prime.

It is a super-2 number, since 2×8256556543² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8256586543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4128278271 + 4128278272.

It is an arithmetic number, because the mean of its divisors is an integer number (4128278272).

Almost surely, 2^8256556543 is an apocalyptic number.

8256556543 is a deficient number, since it is larger than the sum of its proper divisors (1).

8256556543 is an equidigital number, since it uses as much as digits as its factorization.

8256556543 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4320000, while the sum is 49.

The square root of 8256556543 is about 90865.5960361236. The cubic root of 8256556543 is about 2021.1551526917.

The spelling of 8256556543 in words is "eight billion, two hundred fifty-six million, five hundred fifty-six thousand, five hundred forty-three".