561268611 has 12 divisors (see below), whose sum is σ = 812284200. Its totient is φ = 373457760.

The previous prime is 561268601. The next prime is 561268613. The reversal of 561268611 is 116862165.

561268611 is a `hidden beast` number, since 561 + 2 + 6 + 86 + 11 = 666.

It is not a de Polignac number, because 561268611 - 2⁵ = 561268579 is a prime.

It is not an unprimeable number, because it can be changed into a prime (561268613) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 55161 + ... + 64538.

It is an arithmetic number, because the mean of its divisors is an integer number (67690350).

Almost surely, 2^561268611 is an apocalyptic number.

561268611 is a deficient number, since it is larger than the sum of its proper divisors (251015589).

561268611 is a wasteful number, since it uses less digits than its factorization.

561268611 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120226 (or 120223 counting only the distinct ones).

The product of its digits is 17280, while the sum is 36.

The square root of 561268611 is about 23691.1082687155. The cubic root of 561268611 is about 824.8790081519.

The spelling of 561268611 in words is "five hundred sixty-one million, two hundred sixty-eight thousand, six hundred eleven".