561145783 has 8 divisors (see below), whose sum is σ = 614789136. Its totient is φ = 507940800.

The previous prime is 561145757. The next prime is 561145813. The reversal of 561145783 is 387541165.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-561145783 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561145723) 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, 106908 + ... + 112033.

It is an arithmetic number, because the mean of its divisors is an integer number (76848642).

Almost surely, 2^561145783 is an apocalyptic number.

561145783 is a deficient number, since it is larger than the sum of its proper divisors (53643353).

561145783 is a wasteful number, since it uses less digits than its factorization.

561145783 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 219185.

The product of its digits is 100800, while the sum is 40.

The square root of 561145783 is about 23688.5158462914. The cubic root of 561145783 is about 824.8188315992.

The spelling of 561145783 in words is "five hundred sixty-one million, one hundred forty-five thousand, seven hundred eighty-three".