5631160861 has 2 divisors, whose sum is σ = 5631160862. Its totient is φ = 5631160860.

The previous prime is 5631160831. The next prime is 5631160897. The reversal of 5631160861 is 1680611365.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5464905625 + 166255236 = 73925^2 + 12894^2 .

It is a cyclic number.

It is not a de Polignac number, because 5631160861 - 2¹³ = 5631152669 is a prime.

It is a super-2 number, since 2×5631160861² = 63419945284916522642, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 5631160861.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5631160831) 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 as a sum of consecutive naturals, namely, 2815580430 + 2815580431.

It is an arithmetic number, because the mean of its divisors is an integer number (2815580431).

Almost surely, 2^5631160861 is an apocalyptic number.

It is an amenable number.

5631160861 is a deficient number, since it is larger than the sum of its proper divisors (1).

5631160861 is an equidigital number, since it uses as much as digits as its factorization.

5631160861 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 25920, while the sum is 37.

The square root of 5631160861 is about 75041.0611665374. The cubic root of 5631160861 is about 1779.0957049780.

The spelling of 5631160861 in words is "five billion, six hundred thirty-one million, one hundred sixty thousand, eight hundred sixty-one".