56001561543 has 24 divisors (see below), whose sum is σ = 84701588608. Its totient is φ = 36971888184.

The previous prime is 56001561509. The next prime is 56001561593. The reversal of 56001561543 is 34516510065.

56001561543 is a `hidden beast` number, since 5 + 60 + 0 + 1 + 56 + 1 + 543 = 666.

It is not a de Polignac number, because 56001561543 - 2³⁰ = 54927819719 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 56001561498 and 56001561507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56001561503) 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 23 ways as a sum of consecutive naturals, for example, 1093705 + ... + 1143762.

Almost surely, 2^56001561543 is an apocalyptic number.

56001561543 is a deficient number, since it is larger than the sum of its proper divisors (28700027065).

56001561543 is a wasteful number, since it uses less digits than its factorization.

56001561543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2237585 (or 2237573 counting only the distinct ones).

The product of its (nonzero) digits is 54000, while the sum is 36.

The spelling of 56001561543 in words is "fifty-six billion, one million, five hundred sixty-one thousand, five hundred forty-three".