561903884724 has 96 divisors (see below), whose sum is σ = 1613904203520. Its totient is φ = 148173170688.

The previous prime is 561903884719. The next prime is 561903884743. The reversal of 561903884724 is 427488309165.

It is a happy number.

It is a congruent number.

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 31 ways as a sum of consecutive naturals, for example, 8476942 + ... + 8542970.

It is an arithmetic number, because the mean of its divisors is an integer number (16811502120).

It is a 1-persistent number, because it is pandigital, but 2⋅561903884724 = 1123807769448 is not.

Almost surely, 2^561903884724 is an apocalyptic number.

It is an amenable number.

561903884724 is an abundant number, since it is smaller than the sum of its proper divisors (1052000318796).

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

561903884724 is a wasteful number, since it uses less digits than its factorization.

561903884724 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73849 (or 73847 counting only the distinct ones).

The product of its (nonzero) digits is 11612160, while the sum is 57.

The spelling of 561903884724 in words is "five hundred sixty-one billion, nine hundred three million, eight hundred eighty-four thousand, seven hundred twenty-four".