561023156 has 12 divisors (see below), whose sum is σ = 1008325668. Its totient is φ = 272930112.

The previous prime is 561023147. The next prime is 561023167. The reversal of 561023156 is 651320165.

It can be written as a sum of positive squares in 2 ways, for example, as 525143056 + 35880100 = 22916^2 + 5990^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1895201 + ... + 1895496.

It is an arithmetic number, because the mean of its divisors is an integer number (84027139).

Almost surely, 2^561023156 is an apocalyptic number.

It is an amenable number.

561023156 is a deficient number, since it is larger than the sum of its proper divisors (447302512).

561023156 is a wasteful number, since it uses less digits than its factorization.

561023156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3790738 (or 3790736 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 29.

The square root of 561023156 is about 23685.9273831531. The cubic root of 561023156 is about 824.7587447610.

The spelling of 561023156 in words is "five hundred sixty-one million, twenty-three thousand, one hundred fifty-six".