5561216030661 has 8 divisors (see below), whose sum is σ = 7415101853664. Its totient is φ = 3707403780720.

The previous prime is 5561216030653. The next prime is 5561216030663. The reversal of 5561216030661 is 1660306121655.

5561216030661 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 5561216030661 - 2³ = 5561216030653 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5561216030663) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18216651 + ... + 18519416.

It is an arithmetic number, because the mean of its divisors is an integer number (926887731708).

Almost surely, 2^{5561216030661} is an apocalyptic number.

It is an amenable number.

5561216030661 is a deficient number, since it is larger than the sum of its proper divisors (1853885823003).

5561216030661 is a wasteful number, since it uses less digits than its factorization.

5561216030661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36786531.

The product of its (nonzero) digits is 194400, while the sum is 42.

The spelling of 5561216030661 in words is "five trillion, five hundred sixty-one billion, two hundred sixteen million, thirty thousand, six hundred sixty-one".