561256063 has 2 divisors, whose sum is σ = 561256064. Its totient is φ = 561256062.

The previous prime is 561256049. The next prime is 561256079. The reversal of 561256063 is 360652165.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 561256063 - 2⁹ = 561255551 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (561256013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 280628031 + 280628032.

It is an arithmetic number, because the mean of its divisors is an integer number (280628032).

Almost surely, 2^561256063 is an apocalyptic number.

561256063 is a deficient number, since it is larger than the sum of its proper divisors (1).

561256063 is an equidigital number, since it uses as much as digits as its factorization.

561256063 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32400, while the sum is 34.

The square root of 561256063 is about 23690.8434421403. The cubic root of 561256063 is about 824.8728609711.

The spelling of 561256063 in words is "five hundred sixty-one million, two hundred fifty-six thousand, sixty-three".