5561111693 has 2 divisors, whose sum is σ = 5561111694. Its totient is φ = 5561111692.

The previous prime is 5561111683. The next prime is 5561111737. The reversal of 5561111693 is 3961111655.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5558746249 + 2365444 = 74557^2 + 1538^2 .

It is a cyclic number.

It is not a de Polignac number, because 5561111693 - 2³⁰ = 4487369869 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5561111623) 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 as a sum of consecutive naturals, namely, 2780555846 + 2780555847.

It is an arithmetic number, because the mean of its divisors is an integer number (2780555847).

Almost surely, 2^5561111693 is an apocalyptic number.

It is an amenable number.

5561111693 is a deficient number, since it is larger than the sum of its proper divisors (1).

5561111693 is an equidigital number, since it uses as much as digits as its factorization.

5561111693 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 24300, while the sum is 38.

The square root of 5561111693 is about 74572.8616388026. The cubic root of 5561111693 is about 1771.6878462905.

Subtracting from 5561111693 its sum of digits (38), we obtain a palindrome (5561111655).

The spelling of 5561111693 in words is "five billion, five hundred sixty-one million, one hundred eleven thousand, six hundred ninety-three".