561020505 has 32 divisors (see below), whose sum is σ = 946266240. Its totient is φ = 283046400.

The previous prime is 561020497. The next prime is 561020521. The reversal of 561020505 is 505020165.

561020505 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 561020505 - 2³ = 561020497 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 310605 + ... + 312405.

It is an arithmetic number, because the mean of its divisors is an integer number (29570820).

Almost surely, 2^561020505 is an apocalyptic number.

It is an amenable number.

561020505 is a deficient number, since it is larger than the sum of its proper divisors (385245735).

561020505 is a wasteful number, since it uses less digits than its factorization.

561020505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2921.

The product of its (nonzero) digits is 1500, while the sum is 24.

The square root of 561020505 is about 23685.8714215880. The cubic root of 561020505 is about 824.7574456828.

The spelling of 561020505 in words is "five hundred sixty-one million, twenty thousand, five hundred five".