561672783944 has 16 divisors (see below), whose sum is σ = 1081599618300. Its totient is φ = 273246219072.

The previous prime is 561672783901. The next prime is 561672783983. The reversal of 561672783944 is 449387276165.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 560416932100 + 1255851844 = 748610^2 + 35438^2 .

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, 948771299 + ... + 948771890.

Almost surely, 2^561672783944 is an apocalyptic number.

It is an amenable number.

561672783944 is a deficient number, since it is larger than the sum of its proper divisors (519926834356).

561672783944 is a wasteful number, since it uses less digits than its factorization.

561672783944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1897543232 (or 1897543228 counting only the distinct ones).

The product of its digits is 60963840, while the sum is 62.

The spelling of 561672783944 in words is "five hundred sixty-one billion, six hundred seventy-two million, seven hundred eighty-three thousand, nine hundred forty-four".