561403513844 has 24 divisors (see below), whose sum is σ = 1025197907328. Its totient is φ = 268490451680.

The previous prime is 561403513813. The next prime is 561403513861. The reversal of 561403513844 is 448315304165.

It is a junction number, because it is equal to n+sod(n) for n = 561403513795 and 561403513804.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6833129 + ... + 6914799.

It is an arithmetic number, because the mean of its divisors is an integer number (42716579472).

Almost surely, 2^561403513844 is an apocalyptic number.

It is an amenable number.

561403513844 is a deficient number, since it is larger than the sum of its proper divisors (463794393484).

561403513844 is a wasteful number, since it uses less digits than its factorization.

561403513844 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156415 (or 156413 counting only the distinct ones).

The product of its (nonzero) digits is 691200, while the sum is 44.

The spelling of 561403513844 in words is "five hundred sixty-one billion, four hundred three million, five hundred thirteen thousand, eight hundred forty-four".