5811782157 has 24 divisors (see below), whose sum is σ = 8709378496. Its totient is φ = 3872891232.

The previous prime is 5811782131. The next prime is 5811782159. The reversal of 5811782157 is 7512871185.

5811782157 is a `hidden beast` number, since 581 + 17 + 8 + 2 + 1 + 57 = 666.

It is not a de Polignac number, because 5811782157 - 2¹⁵ = 5811749389 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5811782159) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 931713 + ... + 937929.

Almost surely, 2^5811782157 is an apocalyptic number.

It is an amenable number.

5811782157 is a deficient number, since it is larger than the sum of its proper divisors (2897596339).

5811782157 is an equidigital number, since it uses as much as digits as its factorization.

5811782157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10079 (or 10067 counting only the distinct ones).

The product of its digits is 156800, while the sum is 45.

The square root of 5811782157 is about 76235.0454646680. The cubic root of 5811782157 is about 1797.9175667467.

The spelling of 5811782157 in words is "five billion, eight hundred eleven million, seven hundred eighty-two thousand, one hundred fifty-seven".