561111673337 has 2 divisors, whose sum is σ = 561111673338. Its totient is φ = 561111673336.

The previous prime is 561111673229. The next prime is 561111673349. The reversal of 561111673337 is 733376111165.

It is a happy number.

561111673337 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 476846872681 + 84264800656 = 690541^2 + 290284^2 .

It is a cyclic number.

It is not a de Polignac number, because 561111673337 - 2¹⁰ = 561111672313 is a prime.

It is not a weakly prime, because it can be changed into another prime (561111673387) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 280555836668 + 280555836669.

It is an arithmetic number, because the mean of its divisors is an integer number (280555836669).

Almost surely, 2^561111673337 is an apocalyptic number.

It is an amenable number.

561111673337 is a deficient number, since it is larger than the sum of its proper divisors (1).

561111673337 is an equidigital number, since it uses as much as digits as its factorization.

561111673337 is an evil number, because the sum of its binary digits is even.

The product of its digits is 238140, while the sum is 44.

The spelling of 561111673337 in words is "five hundred sixty-one billion, one hundred eleven million, six hundred seventy-three thousand, three hundred thirty-seven".