561287996 has 6 divisors (see below), whose sum is σ = 982254000. Its totient is φ = 280643996.

The previous prime is 561287983. The next prime is 561288017. The reversal of 561287996 is 699782165.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70160996 + ... + 70161003.

It is an arithmetic number, because the mean of its divisors is an integer number (163709000).

Almost surely, 2^561287996 is an apocalyptic number.

It is an amenable number.

561287996 is a deficient number, since it is larger than the sum of its proper divisors (420966004).

561287996 is a wasteful number, since it uses less digits than its factorization.

561287996 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140322003 (or 140322001 counting only the distinct ones).

The product of its digits is 1632960, while the sum is 53.

The square root of 561287996 is about 23691.5173849207. The cubic root of 561287996 is about 824.8885045530. Note that the first 3 decimals are identical.

The spelling of 561287996 in words is "five hundred sixty-one million, two hundred eighty-seven thousand, nine hundred ninety-six".