561365567 has 4 divisors (see below), whose sum is σ = 641560656. Its totient is φ = 481170480.

The previous prime is 561365537. The next prime is 561365569. The reversal of 561365567 is 765563165.

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

It is not a de Polignac number, because 561365567 - 2⁶ = 561365503 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 (561365569) 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, 40097534 + ... + 40097547.

It is an arithmetic number, because the mean of its divisors is an integer number (160390164).

Almost surely, 2^561365567 is an apocalyptic number.

561365567 is a deficient number, since it is larger than the sum of its proper divisors (80195089).

561365567 is an equidigital number, since it uses as much as digits as its factorization.

561365567 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80195088.

The product of its digits is 567000, while the sum is 44.

The square root of 561365567 is about 23693.1544332957. The cubic root of 561365567 is about 824.9265031557.

The spelling of 561365567 in words is "five hundred sixty-one million, three hundred sixty-five thousand, five hundred sixty-seven".