8591056681 has 4 divisors (see below), whose sum is σ = 8694563472. Its totient is φ = 8487549892.

The previous prime is 8591056679. The next prime is 8591056699. The reversal of 8591056681 is 1866501958.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 8591056681 - 2¹ = 8591056679 is a prime.

It is a super-2 number, since 2×8591056681² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8591056081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 51753271 + ... + 51753436.

It is an arithmetic number, because the mean of its divisors is an integer number (2173640868).

Almost surely, 2^8591056681 is an apocalyptic number.

It is an amenable number.

8591056681 is a deficient number, since it is larger than the sum of its proper divisors (103506791).

8591056681 is a wasteful number, since it uses less digits than its factorization.

8591056681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103506790.

The product of its (nonzero) digits is 518400, while the sum is 49.

The square root of 8591056681 is about 92687.9532679409. The cubic root of 8591056681 is about 2048.0891717390.

The spelling of 8591056681 in words is "eight billion, five hundred ninety-one million, fifty-six thousand, six hundred eighty-one".