5561085109 has 2 divisors, whose sum is σ = 5561085110. Its totient is φ = 5561085108.

The previous prime is 5561085077. The next prime is 5561085161. The reversal of 5561085109 is 9015801655.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5532086884 + 28998225 = 74378^2 + 5385^2 .

It is a cyclic number.

It is not a de Polignac number, because 5561085109 - 2⁵ = 5561085077 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5561095109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2780542554 + 2780542555.

It is an arithmetic number, because the mean of its divisors is an integer number (2780542555).

Almost surely, 2^5561085109 is an apocalyptic number.

It is an amenable number.

5561085109 is a deficient number, since it is larger than the sum of its proper divisors (1).

5561085109 is an equidigital number, since it uses as much as digits as its factorization.

5561085109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 54000, while the sum is 40.

The square root of 5561085109 is about 74572.6833968042. The cubic root of 5561085109 is about 1771.6850231964.

The spelling of 5561085109 in words is "five billion, five hundred sixty-one million, eighty-five thousand, one hundred nine".