561106421644 has 12 divisors (see below), whose sum is σ = 983527710984. Its totient is φ = 280098504224.

The previous prime is 561106421621. The next prime is 561106421657. The reversal of 561106421644 is 446124601165.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 561106421597 and 561106421606.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 113673874 + ... + 113678809.

It is an arithmetic number, because the mean of its divisors is an integer number (81960642582).

Almost surely, 2^561106421644 is an apocalyptic number.

It is an amenable number.

561106421644 is a deficient number, since it is larger than the sum of its proper divisors (422421289340).

561106421644 is a wasteful number, since it uses less digits than its factorization.

561106421644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 227353304 (or 227353302 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 40.

The spelling of 561106421644 in words is "five hundred sixty-one billion, one hundred six million, four hundred twenty-one thousand, six hundred forty-four".