5807811681 has 81 divisors (see below), whose sum is σ = 10353558033. Its totient is φ = 3127617360.

The previous prime is 5807811661. The next prime is 5807811739. The reversal of 5807811681 is 1861187085.

The square root of 5807811681 is 76209.

It is a perfect power (a square), and thus also a powerful number.

5807811681 is a `hidden beast` number, since 580 + 7 + 8 + 1 + 1 + 68 + 1 = 666.

It is a de Polignac number, because none of the positive numbers 2^k-5807811681 is a prime.

It is a super-2 number, since 2×5807811681² = 67461353043920091522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (5807811601) by changing a digit.

It is a polite number, since it can be written in 80 ways as a sum of consecutive naturals, for example, 30407296 + ... + 30407486.

Almost surely, 2^5807811681 is an apocalyptic number.

5807811681 is the 76209-th square number.

5807811681 is the 38105-th centered octagonal number.

It is an amenable number.

5807811681 is a deficient number, since it is larger than the sum of its proper divisors (4545746352).

5807811681 is a wasteful number, since it uses less digits than its factorization.

5807811681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 440 (or 220 counting only the distinct ones).

The product of its (nonzero) digits is 107520, while the sum is 45.

The cubic root of 5807811681 is about 1797.5080414862.

The spelling of 5807811681 in words is "five billion, eight hundred seven million, eight hundred eleven thousand, six hundred eighty-one".