561055128 has 32 divisors (see below), whose sum is σ = 1411252800. Its totient is φ = 185869728.

The previous prime is 561055127. The next prime is 561055133. The reversal of 561055128 is 821550165.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561055127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 67798 + ... + 75621.

It is an arithmetic number, because the mean of its divisors is an integer number (44101650).

Almost surely, 2^561055128 is an apocalyptic number.

It is an amenable number.

561055128 is an abundant number, since it is smaller than the sum of its proper divisors (850197672).

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

561055128 is a wasteful number, since it uses less digits than its factorization.

561055128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143591 (or 143587 counting only the distinct ones).

The product of its (nonzero) digits is 12000, while the sum is 33.

The square root of 561055128 is about 23686.6022890578. The cubic root of 561055128 is about 824.7744117826.

The spelling of 561055128 in words is "five hundred sixty-one million, fifty-five thousand, one hundred twenty-eight".