561954471944 has 32 divisors (see below), whose sum is σ = 1104195006720. Its totient is φ = 267607334016.

The previous prime is 561954471917. The next prime is 561954471959. The reversal of 561954471944 is 449174459165.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6510992 + ... + 6596735.

It is an arithmetic number, because the mean of its divisors is an integer number (34506093960).

Almost surely, 2^561954471944 is an apocalyptic number.

It is an amenable number.

561954471944 is a deficient number, since it is larger than the sum of its proper divisors (542240534776).

561954471944 is a wasteful number, since it uses less digits than its factorization.

561954471944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13107989 (or 13107985 counting only the distinct ones).

The product of its digits is 21772800, while the sum is 59.

The spelling of 561954471944 in words is "five hundred sixty-one billion, nine hundred fifty-four million, four hundred seventy-one thousand, nine hundred forty-four".