5561558389 has 2 divisors, whose sum is σ = 5561558390. Its totient is φ = 5561558388.

The previous prime is 5561558383. The next prime is 5561558399. The reversal of 5561558389 is 9838551655.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4831640100 + 729918289 = 69510^2 + 27017^2 .

It is a cyclic number.

It is not a de Polignac number, because 5561558389 - 2¹⁵ = 5561525621 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5561558383) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2780779194 + 2780779195.

It is an arithmetic number, because the mean of its divisors is an integer number (2780779195).

Almost surely, 2^5561558389 is an apocalyptic number.

It is an amenable number.

5561558389 is a deficient number, since it is larger than the sum of its proper divisors (1).

5561558389 is an equidigital number, since it uses as much as digits as its factorization.

5561558389 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6480000, while the sum is 55.

The square root of 5561558389 is about 74575.8566092271. The cubic root of 5561558389 is about 1771.7352819310.

The spelling of 5561558389 in words is "five billion, five hundred sixty-one million, five hundred fifty-eight thousand, three hundred eighty-nine".