561732911 has 4 divisors (see below), whose sum is σ = 562471824. Its totient is φ = 560994000.

The previous prime is 561732893. The next prime is 561732947. The reversal of 561732911 is 119237165.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 561732911 - 2²⁶ = 494624047 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561738911) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 368315 + ... + 369836.

It is an arithmetic number, because the mean of its divisors is an integer number (140617956).

Almost surely, 2^561732911 is an apocalyptic number.

561732911 is a deficient number, since it is larger than the sum of its proper divisors (738913).

561732911 is an equidigital number, since it uses as much as digits as its factorization.

561732911 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 738912.

The product of its digits is 11340, while the sum is 35.

The square root of 561732911 is about 23700.9052780690. The cubic root of 561732911 is about 825.1064012140.

The spelling of 561732911 in words is "five hundred sixty-one million, seven hundred thirty-two thousand, nine hundred eleven".