561203607543 has 4 divisors (see below), whose sum is σ = 748271476728. Its totient is φ = 374135738360.

The previous prime is 561203607539. The next prime is 561203607551. The reversal of 561203607543 is 345706302165.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 561203607543 - 2² = 561203607539 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 561203607495 and 561203607504.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561203607533) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 93533934588 + ... + 93533934593.

It is an arithmetic number, because the mean of its divisors is an integer number (187067869182).

Almost surely, 2^561203607543 is an apocalyptic number.

561203607543 is a deficient number, since it is larger than the sum of its proper divisors (187067869185).

561203607543 is a wasteful number, since it uses less digits than its factorization.

561203607543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 187067869184.

The product of its (nonzero) digits is 453600, while the sum is 42.

It can be divided in two parts, 56120 and 3607543, that added together give a palindrome (3663663).

The spelling of 561203607543 in words is "five hundred sixty-one billion, two hundred three million, six hundred seven thousand, five hundred forty-three".