561144101200 has 60 divisors (see below), whose sum is σ = 1348220754108. Its totient is φ = 224445644800.

The previous prime is 561144101173. The next prime is 561144101209. The reversal of 561144101200 is 2101441165.

It can be written as a sum of positive squares in 6 ways, for example, as 29983000336 + 531161100864 = 173156^2 + 728808^2 .

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561144101209) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14353680 + ... + 14392720.

Almost surely, 2^561144101200 is an apocalyptic number.

561144101200 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

561144101200 is an abundant number, since it is smaller than the sum of its proper divisors (787076652908).

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

561144101200 is a wasteful number, since it uses less digits than its factorization.

561144101200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74992 (or 74981 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 25.

Adding to 561144101200 its reverse (2101441165), we get a palindrome (563245542365).

The spelling of 561144101200 in words is "five hundred sixty-one billion, one hundred forty-four million, one hundred one thousand, two hundred".