218889841551 has 8 divisors (see below), whose sum is σ = 294081009024. Its totient is φ = 144812617560.

The previous prime is 218889841529. The next prime is 218889841607. The reversal of 218889841551 is 155148988812.

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

It is not a de Polignac number, because 218889841551 - 2⁵ = 218889841519 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (218889841351) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 278485411 + ... + 278486196.

It is an arithmetic number, because the mean of its divisors is an integer number (36760126128).

Almost surely, 2^218889841551 is an apocalyptic number.

218889841551 is a deficient number, since it is larger than the sum of its proper divisors (75191167473).

218889841551 is a wasteful number, since it uses less digits than its factorization.

218889841551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 556971741.

The product of its digits is 7372800, while the sum is 60.

The spelling of 218889841551 in words is "two hundred eighteen billion, eight hundred eighty-nine million, eight hundred forty-one thousand, five hundred fifty-one".