5661511561100 has 18 divisors (see below), whose sum is σ = 12285480087804. Its totient is φ = 2264604624400.

The previous prime is 5661511561099. The next prime is 5661511561117. The reversal of 5661511561100 is 11651151665.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 28307557706 + ... + 28307557905.

Almost surely, 2^{5661511561100} is an apocalyptic number.

5661511561100 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

5661511561100 is an abundant number, since it is smaller than the sum of its proper divisors (6623968526704).

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

5661511561100 is a wasteful number, since it uses less digits than its factorization.

5661511561100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56615115625 (or 56615115618 counting only the distinct ones).

The product of its (nonzero) digits is 27000, while the sum is 38.

The spelling of 5661511561100 in words is "five trillion, six hundred sixty-one billion, five hundred eleven million, five hundred sixty-one thousand, one hundred".