561967646 has 8 divisors (see below), whose sum is σ = 843261240. Its totient is φ = 280880568.

The previous prime is 561967643. The next prime is 561967661. The reversal of 561967646 is 646769165.

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

It is a junction number, because it is equal to n+sod(n) for n = 561967594 and 561967603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561967643) 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 3 ways as a sum of consecutive naturals, for example, 44636 + ... + 55823.

It is an arithmetic number, because the mean of its divisors is an integer number (105407655).

Almost surely, 2^561967646 is an apocalyptic number.

561967646 is a deficient number, since it is larger than the sum of its proper divisors (281293594).

561967646 is a wasteful number, since it uses less digits than its factorization.

561967646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103258.

The product of its digits is 1632960, while the sum is 50.

The square root of 561967646 is about 23705.8567868786. The cubic root of 561967646 is about 825.2213160755.

The spelling of 561967646 in words is "five hundred sixty-one million, nine hundred sixty-seven thousand, six hundred forty-six".