561103552603 has 6 divisors (see below), whose sum is σ = 616750186052. Its totient is φ = 510094138620.

The previous prime is 561103552589. The next prime is 561103552609. The reversal of 561103552603 is 306255301165.

It is not a de Polignac number, because 561103552603 - 2²⁹ = 560566681691 is a prime.

It is not an unprimeable number, because it can be changed into a prime (561103552609) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2318609601 + ... + 2318609842.

Almost surely, 2^561103552603 is an apocalyptic number.

561103552603 is a deficient number, since it is larger than the sum of its proper divisors (55646633449).

561103552603 is a wasteful number, since it uses less digits than its factorization.

561103552603 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4637219465 (or 4637219454 counting only the distinct ones).

The product of its (nonzero) digits is 81000, while the sum is 37.

Adding to 561103552603 its reverse (306255301165), we get a palindrome (867358853768).

The spelling of 561103552603 in words is "five hundred sixty-one billion, one hundred three million, five hundred fifty-two thousand, six hundred three".