216444068187 has 8 divisors (see below), whose sum is σ = 305568096336. Its totient is φ = 135808042752.

The previous prime is 216444068177. The next prime is 216444068209. The reversal of 216444068187 is 781860444612.

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

It is not a de Polignac number, because 216444068187 - 2⁷ = 216444068059 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (51), and also a Moran number because the ratio is a prime number: 4244001337 = 216444068187 / (2 + 1 + 6 + 4 + 4 + 4 + 0 + 6 + 8 + 1 + 8 + 7).

It is not an unprimeable number, because it can be changed into a prime (216444068117) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2122000618 + ... + 2122000719.

It is an arithmetic number, because the mean of its divisors is an integer number (38196012042).

Almost surely, 2^216444068187 is an apocalyptic number.

216444068187 is a deficient number, since it is larger than the sum of its proper divisors (89124028149).

216444068187 is a wasteful number, since it uses less digits than its factorization.

216444068187 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4244001357.

The product of its (nonzero) digits is 2064384, while the sum is 51.

The spelling of 216444068187 in words is "two hundred sixteen billion, four hundred forty-four million, sixty-eight thousand, one hundred eighty-seven".