561674181 has 8 divisors (see below), whose sum is σ = 788314720. Its totient is φ = 354741552.

The previous prime is 561674173. The next prime is 561674209. The reversal of 561674181 is 181476165.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 561674181 - 2³ = 561674173 is a prime.

It is a super-2 number, since 2×561674181² = 630955771204041522, which contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561674081) 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 7 ways as a sum of consecutive naturals, for example, 4926910 + ... + 4927023.

It is an arithmetic number, because the mean of its divisors is an integer number (98539340).

Almost surely, 2^561674181 is an apocalyptic number.

It is an amenable number.

561674181 is a deficient number, since it is larger than the sum of its proper divisors (226640539).

561674181 is a wasteful number, since it uses less digits than its factorization.

561674181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9853955.

The product of its digits is 40320, while the sum is 39.

The square root of 561674181 is about 23699.6662634730. Note that the first 3 decimals coincide. The cubic root of 561674181 is about 825.0776448502.

It can be divided in two parts, 5616 and 74181, that added together give a palindrome (79797).

The spelling of 561674181 in words is "five hundred sixty-one million, six hundred seventy-four thousand, one hundred eighty-one".