8556468491 has 2 divisors, whose sum is σ = 8556468492. Its totient is φ = 8556468490.

The previous prime is 8556468469. The next prime is 8556468497. The reversal of 8556468491 is 1948646558.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8556468491 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (8556468497) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4278234245 + 4278234246.

It is an arithmetic number, because the mean of its divisors is an integer number (4278234246).

Almost surely, 2^8556468491 is an apocalyptic number.

8556468491 is a deficient number, since it is larger than the sum of its proper divisors (1).

8556468491 is an equidigital number, since it uses as much as digits as its factorization.

8556468491 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8294400, while the sum is 56.

The square root of 8556468491 is about 92501.1810248929. The cubic root of 8556468491 is about 2045.3368917899.

The spelling of 8556468491 in words is "eight billion, five hundred fifty-six million, four hundred sixty-eight thousand, four hundred ninety-one".