561865463 has 2 divisors, whose sum is σ = 561865464. Its totient is φ = 561865462.

The previous prime is 561865457. The next prime is 561865501. The reversal of 561865463 is 364568165.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 561865463 - 2¹⁰ = 561864439 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (561865433) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 280932731 + 280932732.

It is an arithmetic number, because the mean of its divisors is an integer number (280932732).

Almost surely, 2^561865463 is an apocalyptic number.

561865463 is a deficient number, since it is larger than the sum of its proper divisors (1).

561865463 is an equidigital number, since it uses as much as digits as its factorization.

561865463 is an evil number, because the sum of its binary digits is even.

The product of its digits is 518400, while the sum is 44.

The square root of 561865463 is about 23703.7014620080. The cubic root of 561865463 is about 825.1712961727.

The spelling of 561865463 in words is "five hundred sixty-one million, eight hundred sixty-five thousand, four hundred sixty-three".