50556505566 has 64 divisors (see below), whose sum is σ = 122028940800. Its totient is φ = 13640679936.

The previous prime is 50556505537. The next prime is 50556505577. The reversal of 50556505566 is 66550565505.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 148570 + ... + 350978.

It is an arithmetic number, because the mean of its divisors is an integer number (1906702200).

Almost surely, 2^50556505566 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 50556505566, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (61014470400).

50556505566 is an abundant number, since it is smaller than the sum of its proper divisors (71472435234).

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

50556505566 is a wasteful number, since it uses less digits than its factorization.

50556505566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 202753.

The product of its (nonzero) digits is 3375000, while the sum is 48.

The spelling of 50556505566 in words is "fifty billion, five hundred fifty-six million, five hundred five thousand, five hundred sixty-six".