561111055620 has 48 divisors (see below), whose sum is σ = 1571144662080. Its totient is φ = 149626404736.

The previous prime is 561111055607. The next prime is 561111055627. The reversal of 561111055620 is 26550111165.

It is not an unprimeable number, because it can be changed into a prime (561111055627) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4355086 + ... + 4482074.

It is an arithmetic number, because the mean of its divisors is an integer number (32732180460).

Almost surely, 2^561111055620 is an apocalyptic number.

It is an amenable number.

561111055620 is an abundant number, since it is smaller than the sum of its proper divisors (1010033606460).

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

561111055620 is a wasteful number, since it uses less digits than its factorization.

561111055620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 200644 (or 200642 counting only the distinct ones).

The product of its (nonzero) digits is 9000, while the sum is 33.

Adding to 561111055620 its reverse (26550111165), we get a palindrome (587661166785).

The spelling of 561111055620 in words is "five hundred sixty-one billion, one hundred eleven million, fifty-five thousand, six hundred twenty".