561383166 has 32 divisors (see below), whose sum is σ = 1164354048. Its totient is φ = 180295200.

The previous prime is 561383143. The next prime is 561383167. The reversal of 561383166 is 661383165.

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 15 ways as a sum of consecutive naturals, for example, 10591 + ... + 35141.

It is an arithmetic number, because the mean of its divisors is an integer number (36386064).

Almost surely, 2^561383166 is an apocalyptic number.

561383166 is an abundant number, since it is smaller than the sum of its proper divisors (602970882).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

561383166 is a wasteful number, since it uses less digits than its factorization.

561383166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24696.

The product of its digits is 77760, while the sum is 39.

The square root of 561383166 is about 23693.5258245792. The cubic root of 561383166 is about 824.9351236404.

Subtracting 561383166 from its reverse (661383165), we obtain a palindrome (99999999).

The spelling of 561383166 in words is "five hundred sixty-one million, three hundred eighty-three thousand, one hundred sixty-six".