561632266 has 16 divisors (see below), whose sum is σ = 908609184. Its totient is φ = 258827184.

The previous prime is 561632249. The next prime is 561632273. The reversal of 561632266 is 662236165.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 1945 + ... + 33571.

It is an arithmetic number, because the mean of its divisors is an integer number (56788074).

Almost surely, 2^561632266 is an apocalyptic number.

561632266 is a deficient number, since it is larger than the sum of its proper divisors (346976918).

561632266 is a wasteful number, since it uses less digits than its factorization.

561632266 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32325.

The product of its digits is 77760, while the sum is 37.

The square root of 561632266 is about 23698.7819518219. The cubic root of 561632266 is about 825.0571205017.

The spelling of 561632266 in words is "five hundred sixty-one million, six hundred thirty-two thousand, two hundred sixty-six".