561413166 has 16 divisors (see below), whose sum is σ = 1124108544. Its totient is φ = 186924024.

The previous prime is 561413137. The next prime is 561413221. The reversal of 561413166 is 661314165.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 47686 + ... + 58281.

It is an arithmetic number, because the mean of its divisors is an integer number (70256784).

Almost surely, 2^561413166 is an apocalyptic number.

561413166 is an abundant number, since it is smaller than the sum of its proper divisors (562695378).

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

561413166 is a wasteful number, since it uses less digits than its factorization.

561413166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106855.

The product of its digits is 12960, while the sum is 33.

The square root of 561413166 is about 23694.1589004548. The cubic root of 561413166 is about 824.9498180680.

Subtracting 561413166 from its reverse (661314165), we obtain a palindrome (99900999).

The spelling of 561413166 in words is "five hundred sixty-one million, four hundred thirteen thousand, one hundred sixty-six".