561540449440 has 48 divisors (see below), whose sum is σ = 1327532032512. Its totient is φ = 224465031424.

The previous prime is 561540449413. The next prime is 561540449453. The reversal of 561540449440 is 44944045165.

It is an unprimeable number.

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, 942184 + ... + 1418023.

It is an arithmetic number, because the mean of its divisors is an integer number (27656917344).

Almost surely, 2^561540449440 is an apocalyptic number.

It is an amenable number.

561540449440 is an abundant number, since it is smaller than the sum of its proper divisors (765991583072).

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

561540449440 is a wasteful number, since it uses less digits than its factorization.

561540449440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2361709 (or 2361701 counting only the distinct ones).

The product of its (nonzero) digits is 1382400, while the sum is 46.

The spelling of 561540449440 in words is "five hundred sixty-one billion, five hundred forty million, four hundred forty-nine thousand, four hundred forty".