5608361861 has 2 divisors, whose sum is σ = 5608361862. Its totient is φ = 5608361860.

The previous prime is 5608361813. The next prime is 5608361893. The reversal of 5608361861 is 1681638065.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5474520100 + 133841761 = 73990^2 + 11569^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-5608361861 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5608360861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2804180930 + 2804180931.

It is an arithmetic number, because the mean of its divisors is an integer number (2804180931).

Almost surely, 2^5608361861 is an apocalyptic number.

It is an amenable number.

5608361861 is a deficient number, since it is larger than the sum of its proper divisors (1).

5608361861 is an equidigital number, since it uses as much as digits as its factorization.

5608361861 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 207360, while the sum is 44.

The square root of 5608361861 is about 74888.9969287879. The cubic root of 5608361861 is about 1776.6914365205.

The spelling of 5608361861 in words is "five billion, six hundred eight million, three hundred sixty-one thousand, eight hundred sixty-one".