5561000561100 has 72 divisors (see below), whose sum is σ = 16147914554128. Its totient is φ = 1477579910400.

The previous prime is 5561000560987. The next prime is 5561000561113. The reversal of 5561000561100 is 11650001655.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 33376591 + ... + 33542790.

Almost surely, 2^{5561000561100} is an apocalyptic number.

5561000561100 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

5561000561100 is an abundant number, since it is smaller than the sum of its proper divisors (10586913993028).

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

5561000561100 is a wasteful number, since it uses less digits than its factorization.

5561000561100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66919675 (or 66919668 counting only the distinct ones).

The product of its (nonzero) digits is 4500, while the sum is 30.

Adding to 5561000561100 its reverse (11650001655), we get a palindrome (5572650562755).

The spelling of 5561000561100 in words is "five trillion, five hundred sixty-one billion, five hundred sixty-one thousand, one hundred".