561905735623 has 2 divisors, whose sum is σ = 561905735624. Its totient is φ = 561905735622.

The previous prime is 561905735603. The next prime is 561905735641. The reversal of 561905735623 is 326537509165.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 561905735623 - 2¹³ = 561905727431 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (561905735603) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 280952867811 + 280952867812.

It is an arithmetic number, because the mean of its divisors is an integer number (280952867812).

Almost surely, 2^561905735623 is an apocalyptic number.

561905735623 is a deficient number, since it is larger than the sum of its proper divisors (1).

561905735623 is an equidigital number, since it uses as much as digits as its factorization.

561905735623 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5103000, while the sum is 52.

The spelling of 561905735623 in words is "five hundred sixty-one billion, nine hundred five million, seven hundred thirty-five thousand, six hundred twenty-three".