561741674261 has 2 divisors, whose sum is σ = 561741674262. Its totient is φ = 561741674260.

The previous prime is 561741674233. The next prime is 561741674279. The reversal of 561741674261 is 162476147165.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 424615140625 + 137126533636 = 651625^2 + 370306^2 .

It is a cyclic number.

It is not a de Polignac number, because 561741674261 - 2¹⁴ = 561741657877 is a prime.

It is a super-2 number, since 2×561741674261² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (561741674201) 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, 280870837130 + 280870837131.

It is an arithmetic number, because the mean of its divisors is an integer number (280870837131).

Almost surely, 2^561741674261 is an apocalyptic number.

It is an amenable number.

561741674261 is a deficient number, since it is larger than the sum of its proper divisors (1).

561741674261 is an equidigital number, since it uses as much as digits as its factorization.

561741674261 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1693440, while the sum is 50.

The spelling of 561741674261 in words is "five hundred sixty-one billion, seven hundred forty-one million, six hundred seventy-four thousand, two hundred sixty-one".