561664577328 has 40 divisors (see below), whose sum is σ = 1536317816688. Its totient is φ = 176208494592.

The previous prime is 561664577323. The next prime is 561664577351. The reversal of 561664577328 is 823775466165.

It is not an unprimeable number, because it can be changed into a prime (561664577323) 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 7 ways as a sum of consecutive naturals, for example, 344156401 + ... + 344158032.

Almost surely, 2^561664577328 is an apocalyptic number.

It is an amenable number.

561664577328 is an abundant number, since it is smaller than the sum of its proper divisors (974653239360).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

561664577328 is a wasteful number, since it uses less digits than its factorization.

561664577328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 688314461 (or 688314455 counting only the distinct ones).

The product of its digits is 50803200, while the sum is 60.

The spelling of 561664577328 in words is "five hundred sixty-one billion, six hundred sixty-four million, five hundred seventy-seven thousand, three hundred twenty-eight".