561235747249 has 2 divisors, whose sum is σ = 561235747250. Its totient is φ = 561235747248.

The previous prime is 561235747133. The next prime is 561235747253. The reversal of 561235747249 is 942747532165.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 560503774224 + 731973025 = 748668^2 + 27055^2 .

It is a cyclic number.

It is not a de Polignac number, because 561235747249 - 2¹⁷ = 561235616177 is a prime.

It is a super-2 number, since 2×561235747249² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 561235747249.

It is not a weakly prime, because it can be changed into another prime (561235747049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 280617873624 + 280617873625.

It is an arithmetic number, because the mean of its divisors is an integer number (280617873625).

Almost surely, 2^561235747249 is an apocalyptic number.

It is an amenable number.

561235747249 is a deficient number, since it is larger than the sum of its proper divisors (1).

561235747249 is an equidigital number, since it uses as much as digits as its factorization.

561235747249 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12700800, while the sum is 55.

The spelling of 561235747249 in words is "five hundred sixty-one billion, two hundred thirty-five million, seven hundred forty-seven thousand, two hundred forty-nine".