561383164 has 24 divisors (see below), whose sum is σ = 1006084800. Its totient is φ = 274010880.

The previous prime is 561383143. The next prime is 561383167. The reversal of 561383164 is 461383165.

561383164 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561383167) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18144 + ... + 38104.

It is an arithmetic number, because the mean of its divisors is an integer number (41920200).

Almost surely, 2^561383164 is an apocalyptic number.

It is an amenable number.

561383164 is a deficient number, since it is larger than the sum of its proper divisors (444701636).

561383164 is a wasteful number, since it uses less digits than its factorization.

561383164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20133 (or 20131 counting only the distinct ones).

The product of its digits is 51840, while the sum is 37.

The square root of 561383164 is about 23693.5257823735. The cubic root of 561383164 is about 824.9351226607.

Subtracting from 561383164 its reverse (461383165), we obtain a palindrome (99999999).

The spelling of 561383164 in words is "five hundred sixty-one million, three hundred eighty-three thousand, one hundred sixty-four".