561115726528 has 56 divisors (see below), whose sum is σ = 1327857737472. Its totient is φ = 230022591744.

The previous prime is 561115726519. The next prime is 561115726529. The reversal of 561115726528 is 825627511165.

It is a tau number, because it is divible by the number of its divisors (56).

It is not an unprimeable number, because it can be changed into a prime (561115726529) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27217750 + ... + 27238357.

It is an arithmetic number, because the mean of its divisors is an integer number (23711745312).

Almost surely, 2^561115726528 is an apocalyptic number.

It is an amenable number.

561115726528 is an abundant number, since it is smaller than the sum of its proper divisors (766742010944).

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

561115726528 is a wasteful number, since it uses less digits than its factorization.

561115726528 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54456149 (or 54456139 counting only the distinct ones).

The product of its digits is 1008000, while the sum is 49.

The spelling of 561115726528 in words is "five hundred sixty-one billion, one hundred fifteen million, seven hundred twenty-six thousand, five hundred twenty-eight".