8056859891 has 2 divisors, whose sum is σ = 8056859892. Its totient is φ = 8056859890.

The previous prime is 8056859887. The next prime is 8056859933. The reversal of 8056859891 is 1989586508.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 8056859891 - 2² = 8056859887 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 8056859891.

It is not a weakly prime, because it can be changed into another prime (8056859821) 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, 4028429945 + 4028429946.

It is an arithmetic number, because the mean of its divisors is an integer number (4028429946).

Almost surely, 2^8056859891 is an apocalyptic number.

8056859891 is a deficient number, since it is larger than the sum of its proper divisors (1).

8056859891 is an equidigital number, since it uses as much as digits as its factorization.

8056859891 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6220800, while the sum is 59.

The square root of 8056859891 is about 89760.0127618084. The cubic root of 8056859891 is about 2004.7271425092.

The spelling of 8056859891 in words is "eight billion, fifty-six million, eight hundred fifty-nine thousand, eight hundred ninety-one".