216949942189 has 16 divisors (see below), whose sum is σ = 219841357120. Its totient is φ = 214081056000.

The previous prime is 216949942159. The next prime is 216949942211. The reversal of 216949942189 is 981249949612.

It is a cyclic number.

It is not a de Polignac number, because 216949942189 - 2¹³ = 216949933997 is a prime.

It is a super-2 number, since 2×216949942189² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 216949942189.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216949942159) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18116974 + ... + 18128944.

It is an arithmetic number, because the mean of its divisors is an integer number (13740084820).

Almost surely, 2^216949942189 is an apocalyptic number.

It is an amenable number.

216949942189 is a deficient number, since it is larger than the sum of its proper divisors (2891414931).

216949942189 is a wasteful number, since it uses less digits than its factorization.

216949942189 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12892.

The product of its digits is 20155392, while the sum is 64.

The spelling of 216949942189 in words is "two hundred sixteen billion, nine hundred forty-nine million, nine hundred forty-two thousand, one hundred eighty-nine".