5117721256 has 16 divisors (see below), whose sum is σ = 9630373140. Its totient is φ = 2549621760.

The previous prime is 5117721253. The next prime is 5117721299. The reversal of 5117721256 is 6521277115.

It can be written as a sum of positive squares in 2 ways, for example, as 5102244900 + 15476356 = 71430^2 + 3934^2 .

It is a super-2 number, since 2×5117721256² = 52382141708228435072, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (5117721253) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1152505 + ... + 1156936.

Almost surely, 2^5117721256 is an apocalyptic number.

It is an amenable number.

5117721256 is a deficient number, since it is larger than the sum of its proper divisors (4512651884).

5117721256 is a wasteful number, since it uses less digits than its factorization.

5117721256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2309724 (or 2309720 counting only the distinct ones).

The product of its digits is 29400, while the sum is 37.

The square root of 5117721256 is about 71538.2503001017. The cubic root of 5117721256 is about 1723.2920158983.

The spelling of 5117721256 in words is "five billion, one hundred seventeen million, seven hundred twenty-one thousand, two hundred fifty-six".