561110561 has 4 divisors (see below), whose sum is σ = 612120624. Its totient is φ = 510100500.

The previous prime is 561110521. The next prime is 561110567. The reversal of 561110561 is 165011165.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 561110561 - 2⁶ = 561110497 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 561110561.

It is not an unprimeable number, because it can be changed into a prime (561110567) 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, 25505015 + ... + 25505036.

It is an arithmetic number, because the mean of its divisors is an integer number (153030156).

Almost surely, 2^561110561 is an apocalyptic number.

It is an amenable number.

561110561 is a deficient number, since it is larger than the sum of its proper divisors (51010063).

561110561 is a wasteful number, since it uses less digits than its factorization.

561110561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51010062.

The product of its (nonzero) digits is 900, while the sum is 26.

The square root of 561110561 is about 23687.7723942122. The cubic root of 561110561 is about 824.8015738279.

The spelling of 561110561 in words is "five hundred sixty-one million, one hundred ten thousand, five hundred sixty-one".