561613849040 has 40 divisors (see below), whose sum is σ = 1305790308000. Its totient is φ = 224638983296.

The previous prime is 561613849033. The next prime is 561613849061. The reversal of 561613849040 is 40948316165.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3399227 + ... + 3560613.

It is an arithmetic number, because the mean of its divisors is an integer number (32644757700).

Almost surely, 2^561613849040 is an apocalyptic number.

It is an amenable number.

561613849040 is an abundant number, since it is smaller than the sum of its proper divisors (744176458960).

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

561613849040 is a wasteful number, since it uses less digits than its factorization.

561613849040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 204899 (or 204893 counting only the distinct ones).

The product of its (nonzero) digits is 622080, while the sum is 47.

The spelling of 561613849040 in words is "five hundred sixty-one billion, six hundred thirteen million, eight hundred forty-nine thousand, forty".