561254240220 has 48 divisors (see below), whose sum is σ = 1571752425600. Its totient is φ = 149644887616.

The previous prime is 561254240201. The next prime is 561254240231. The reversal of 561254240220 is 22042452165.

561254240220 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 318870 + ... + 1106429.

It is an arithmetic number, because the mean of its divisors is an integer number (32744842200).

Almost surely, 2^561254240220 is an apocalyptic number.

It is an amenable number.

561254240220 is an abundant number, since it is smaller than the sum of its proper divisors (1010498185380).

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

561254240220 is a wasteful number, since it uses less digits than its factorization.

561254240220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1431874 (or 1431872 counting only the distinct ones).

The product of its (nonzero) digits is 38400, while the sum is 33.

Adding to 561254240220 its reverse (22042452165), we get a palindrome (583296692385).

The spelling of 561254240220 in words is "five hundred sixty-one billion, two hundred fifty-four million, two hundred forty thousand, two hundred twenty".