218895984851 has 8 divisors (see below), whose sum is σ = 231780280464. Its totient is φ = 206012584960.

The previous prime is 218895984841. The next prime is 218895984883. The reversal of 218895984851 is 158489598812.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 218895984851 - 2²⁶ = 218828875987 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (218895984841) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 316496 + ... + 733458.

It is an arithmetic number, because the mean of its divisors is an integer number (28972535058).

Almost surely, 2^218895984851 is an apocalyptic number.

218895984851 is a deficient number, since it is larger than the sum of its proper divisors (12884295613).

218895984851 is a wasteful number, since it uses less digits than its factorization.

218895984851 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 447861.

The product of its digits is 66355200, while the sum is 68.

The spelling of 218895984851 in words is "two hundred eighteen billion, eight hundred ninety-five million, nine hundred eighty-four thousand, eight hundred fifty-one".