561473663 has 2 divisors, whose sum is σ = 561473664. Its totient is φ = 561473662.

The previous prime is 561473659. The next prime is 561473753. The reversal of 561473663 is 366374165.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 561473663 - 2² = 561473659 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 561473663.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (761473663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 280736831 + 280736832.

It is an arithmetic number, because the mean of its divisors is an integer number (280736832).

Almost surely, 2^561473663 is an apocalyptic number.

561473663 is a deficient number, since it is larger than the sum of its proper divisors (1).

561473663 is an equidigital number, since it uses as much as digits as its factorization.

561473663 is an evil number, because the sum of its binary digits is even.

The product of its digits is 272160, while the sum is 41.

The square root of 561473663 is about 23695.4354887181. The cubic root of 561473663 is about 824.9794487687.

The spelling of 561473663 in words is "five hundred sixty-one million, four hundred seventy-three thousand, six hundred sixty-three".