5631216365 has 4 divisors (see below), whose sum is σ = 6757459644. Its totient is φ = 4504973088.

The previous prime is 5631216361. The next prime is 5631216379. The reversal of 5631216365 is 5636121365.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1451076649 + 4180139716 = 38093^2 + 64654^2 .

It is a cyclic number.

It is not a de Polignac number, because 5631216365 - 2² = 5631216361 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 (5631216361) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 563121632 + ... + 563121641.

It is an arithmetic number, because the mean of its divisors is an integer number (1689364911).

Almost surely, 2^5631216365 is an apocalyptic number.

It is an amenable number.

5631216365 is a deficient number, since it is larger than the sum of its proper divisors (1126243279).

5631216365 is a wasteful number, since it uses less digits than its factorization.

5631216365 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1126243278.

The product of its digits is 97200, while the sum is 38.

The square root of 5631216365 is about 75041.4309898205. The cubic root of 5631216365 is about 1779.1015502265.

The spelling of 5631216365 in words is "five billion, six hundred thirty-one million, two hundred sixteen thousand, three hundred sixty-five".