561050555 has 16 divisors (see below), whose sum is σ = 748441344. Its totient is φ = 400947840.

The previous prime is 561050551. The next prime is 561050593. The reversal of 561050555 is 555050165.

It is not a de Polignac number, because 561050555 - 2² = 561050551 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (561050551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 137204 + ... + 141233.

It is an arithmetic number, because the mean of its divisors is an integer number (46777584).

Almost surely, 2^561050555 is an apocalyptic number.

561050555 is a deficient number, since it is larger than the sum of its proper divisors (187390789).

561050555 is a wasteful number, since it uses less digits than its factorization.

561050555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 278486.

The product of its (nonzero) digits is 18750, while the sum is 32.

The square root of 561050555 is about 23686.5057574983. The cubic root of 561050555 is about 824.7721709430.

It can be divided in two parts, 5610 and 50555, that added together give a palindrome (56165).

The spelling of 561050555 in words is "five hundred sixty-one million, fifty thousand, five hundred fifty-five".