561346232261 has 2 divisors, whose sum is σ = 561346232262. Its totient is φ = 561346232260.

The previous prime is 561346232233. The next prime is 561346232269. The reversal of 561346232261 is 162232643165.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 538287809761 + 23058422500 = 733681^2 + 151850^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-561346232261 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (561346232269) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 280673116130 + 280673116131.

It is an arithmetic number, because the mean of its divisors is an integer number (280673116131).

Almost surely, 2^561346232261 is an apocalyptic number.

It is an amenable number.

561346232261 is a deficient number, since it is larger than the sum of its proper divisors (1).

561346232261 is an equidigital number, since it uses as much as digits as its factorization.

561346232261 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 311040, while the sum is 41.

The spelling of 561346232261 in words is "five hundred sixty-one billion, three hundred forty-six million, two hundred thirty-two thousand, two hundred sixty-one".