561227644 has 24 divisors (see below), whose sum is σ = 1007130320. Its totient is φ = 273563136.

The previous prime is 561227629. The next prime is 561227671. The reversal of 561227644 is 446722165.

It is a congruent number.

It is an unprimeable number.

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, 15202 + ... + 36790.

Almost surely, 2^561227644 is an apocalyptic number.

It is an amenable number.

561227644 is a deficient number, since it is larger than the sum of its proper divisors (445902676).

561227644 is a wasteful number, since it uses less digits than its factorization.

561227644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21757 (or 21755 counting only the distinct ones).

The product of its digits is 80640, while the sum is 37.

The square root of 561227644 is about 23690.2436458556. The cubic root of 561227644 is about 824.8589383553.

The spelling of 561227644 in words is "five hundred sixty-one million, two hundred twenty-seven thousand, six hundred forty-four".