50005566218 has 8 divisors (see below), whose sum is σ = 75010194948. Its totient is φ = 25002167904.

The previous prime is 50005566217. The next prime is 50005566227. The reversal of 50005566218 is 81266550005.

It can be written as a sum of positive squares in 2 ways, for example, as 49949121049 + 56445169 = 223493^2 + 7513^2 .

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

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (50005566217) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 198221 + ... + 373232.

Almost surely, 2^50005566218 is an apocalyptic number.

50005566218 is a deficient number, since it is larger than the sum of its proper divisors (25004628730).

50005566218 is a wasteful number, since it uses less digits than its factorization.

50005566218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 615208.

The product of its (nonzero) digits is 72000, while the sum is 38.

The spelling of 50005566218 in words is "fifty billion, five million, five hundred sixty-six thousand, two hundred eighteen".