5561550016566 has 16 divisors (see below), whose sum is σ = 11166380581104. Its totient is φ = 1846636580864.

The previous prime is 5561550016531. The next prime is 5561550016637. The reversal of 5561550016566 is 6656100551655.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1803354495 + ... + 1803357578.

It is an arithmetic number, because the mean of its divisors is an integer number (697898786319).

Almost surely, 2^{5561550016566} is an apocalyptic number.

5561550016566 is an abundant number, since it is smaller than the sum of its proper divisors (5604830564538).

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

5561550016566 is a wasteful number, since it uses less digits than its factorization.

5561550016566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3606712335.

The product of its (nonzero) digits is 4050000, while the sum is 51.

The spelling of 5561550016566 in words is "five trillion, five hundred sixty-one billion, five hundred fifty million, sixteen thousand, five hundred sixty-six".