561533822838 has 64 divisors (see below), whose sum is σ = 1251526256640. Its totient is φ = 186627499200.

The previous prime is 561533822833. The next prime is 561533822849. The reversal of 561533822838 is 838228335165.

561533822838 is a `hidden beast` number, since 5 + 6 + 1 + 533 + 8 + 22 + 83 + 8 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561533822833) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 42608106 + ... + 42621282.

It is an arithmetic number, because the mean of its divisors is an integer number (19555097760).

Almost surely, 2^561533822838 is an apocalyptic number.

561533822838 is an abundant number, since it is smaller than the sum of its proper divisors (689992433802).

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

561533822838 is a wasteful number, since it uses less digits than its factorization.

561533822838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15450 (or 15444 counting only the distinct ones).

The product of its digits is 8294400, while the sum is 54.

The spelling of 561533822838 in words is "five hundred sixty-one billion, five hundred thirty-three million, eight hundred twenty-two thousand, eight hundred thirty-eight".