5182720857 has 12 divisors (see below), whose sum is σ = 7608876964. Its totient is φ = 3398505120.

The previous prime is 5182720849. The next prime is 5182720867. The reversal of 5182720857 is 7580272815.

It can be written as a sum of positive squares in 2 ways, for example, as 934158096 + 4248562761 = 30564^2 + 65181^2 .

It is not a de Polignac number, because 5182720857 - 2³ = 5182720849 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5182720867) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4719598 + ... + 4720695.

Almost surely, 2^5182720857 is an apocalyptic number.

It is an amenable number.

5182720857 is a deficient number, since it is larger than the sum of its proper divisors (2426156107).

5182720857 is a wasteful number, since it uses less digits than its factorization.

5182720857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9440360 (or 9440357 counting only the distinct ones).

The product of its (nonzero) digits is 313600, while the sum is 45.

The square root of 5182720857 is about 71991.1165144700. The cubic root of 5182720857 is about 1730.5571236281.

The spelling of 5182720857 in words is "five billion, one hundred eighty-two million, seven hundred twenty thousand, eight hundred fifty-seven".