5617318721 has 12 divisors (see below), whose sum is σ = 6819643968. Its totient is φ = 4531616832.

The previous prime is 5617318711. The next prime is 5617318723. The reversal of 5617318721 is 1278137165.

It is a happy number.

It is not a de Polignac number, because 5617318721 - 2⁶ = 5617318657 is a prime.

It is a super-2 number, since 2×5617318721² = 63108539226594151682, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5617318723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1386341 + ... + 1390386.

It is an arithmetic number, because the mean of its divisors is an integer number (568303664).

Almost surely, 2^5617318721 is an apocalyptic number.

It is an amenable number.

5617318721 is a deficient number, since it is larger than the sum of its proper divisors (1202325247).

5617318721 is a wasteful number, since it uses less digits than its factorization.

5617318721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2776768 (or 2776751 counting only the distinct ones).

The product of its digits is 70560, while the sum is 41.

The square root of 5617318721 is about 74948.7739792987. The cubic root of 5617318721 is about 1777.6367578547.

The spelling of 5617318721 in words is "five billion, six hundred seventeen million, three hundred eighteen thousand, seven hundred twenty-one".