561106505 has 24 divisors (see below), whose sum is σ = 746407872. Its totient is φ = 404087552.

The previous prime is 561106501. The next prime is 561106519. The reversal of 561106505 is 505601165.

It is not a de Polignac number, because 561106505 - 2² = 561106501 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (561106501) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 24794 + ... + 41676.

It is an arithmetic number, because the mean of its divisors is an integer number (31100328).

Almost surely, 2^561106505 is an apocalyptic number.

It is an amenable number.

561106505 is a deficient number, since it is larger than the sum of its proper divisors (185301367).

561106505 is a wasteful number, since it uses less digits than its factorization.

561106505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16945 (or 16928 counting only the distinct ones).

The product of its (nonzero) digits is 4500, while the sum is 29.

The square root of 561106505 is about 23687.6867802662. The cubic root of 561106505 is about 824.7995864577.

The spelling of 561106505 in words is "five hundred sixty-one million, one hundred six thousand, five hundred five".