561327037844553 has 16 divisors (see below), whose sum is σ = 831682717440960. Its totient is φ = 374178827611008.

The previous prime is 561327037844543. The next prime is 561327037844593. The reversal of 561327037844553 is 355448730723165.

561327037844553 is a `hidden beast` number, since 5 + 6 + 1 + 3 + 2 + 7 + 0 + 3 + 78 + 4 + 4 + 553 = 666.

It is not a de Polignac number, because 561327037844553 - 2²⁵ = 561327004290121 is a prime.

It is not an unprimeable number, because it can be changed into a prime (561327037844543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1088560200 + ... + 1089075737.

It is an arithmetic number, because the mean of its divisors is an integer number (51980169840060).

Almost surely, 2^{561327037844553} is an apocalyptic number.

It is an amenable number.

561327037844553 is a deficient number, since it is larger than the sum of its proper divisors (270355679596407).

561327037844553 is a wasteful number, since it uses less digits than its factorization.

561327037844553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2177645493 (or 2177645487 counting only the distinct ones).

The product of its (nonzero) digits is 254016000, while the sum is 63.

The spelling of 561327037844553 in words is "five hundred sixty-one trillion, three hundred twenty-seven billion, thirty-seven million, eight hundred forty-four thousand, five hundred fifty-three".