50555428866 has 72 divisors (see below), whose sum is σ = 114226835580. Its totient is φ = 16157983680.

The previous prime is 50555428843. The next prime is 50555428883. The reversal of 50555428866 is 66882455505.

It is a happy number.

50555428866 is a `hidden beast` number, since 5 + 0 + 5 + 554 + 2 + 8 + 86 + 6 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 47967570225 + 2587858641 = 219015^2 + 50871^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 1872076 + ... + 1898888.

Almost surely, 2^50555428866 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 50555428866, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (57113417790).

50555428866 is an abundant number, since it is smaller than the sum of its proper divisors (63671406714).

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

50555428866 is a wasteful number, since it uses less digits than its factorization.

50555428866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26992 (or 26958 counting only the distinct ones).

The product of its (nonzero) digits is 11520000, while the sum is 54.

The spelling of 50555428866 in words is "fifty billion, five hundred fifty-five million, four hundred twenty-eight thousand, eight hundred sixty-six".