218889841550 has 12 divisors (see below), whose sum is σ = 407135105376. Its totient is φ = 87555936600.

The previous prime is 218889841529. The next prime is 218889841607. The reversal of 218889841550 is 55148988812.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 218889841550.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2188898366 + ... + 2188898465.

It is an arithmetic number, because the mean of its divisors is an integer number (33927925448).

Almost surely, 2^218889841550 is an apocalyptic number.

218889841550 is a deficient number, since it is larger than the sum of its proper divisors (188245263826).

218889841550 is a wasteful number, since it uses less digits than its factorization.

218889841550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4377796843 (or 4377796838 counting only the distinct ones).

The product of its (nonzero) digits is 7372800, while the sum is 59.

The spelling of 218889841550 in words is "two hundred eighteen billion, eight hundred eighty-nine million, eight hundred forty-one thousand, five hundred fifty".