561306267323 has 2 divisors, whose sum is σ = 561306267324. Its totient is φ = 561306267322.

The previous prime is 561306267293. The next prime is 561306267367. The reversal of 561306267323 is 323762603165.

It is an a-pointer prime, because the next prime (561306267367) can be obtained adding 561306267323 to its sum of digits (44).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 561306267323 - 2²⁸ = 561037831867 is a prime.

It is not a weakly prime, because it can be changed into another prime (561306267373) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 280653133661 + 280653133662.

It is an arithmetic number, because the mean of its divisors is an integer number (280653133662).

Almost surely, 2^561306267323 is an apocalyptic number.

561306267323 is a deficient number, since it is larger than the sum of its proper divisors (1).

561306267323 is an equidigital number, since it uses as much as digits as its factorization.

561306267323 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 816480, while the sum is 44.

The spelling of 561306267323 in words is "five hundred sixty-one billion, three hundred six million, two hundred sixty-seven thousand, three hundred twenty-three".