216407556189 has 24 divisors (see below), whose sum is σ = 341420319552. Its totient is φ = 130996681920.

The previous prime is 216407556181. The next prime is 216407556191. The reversal of 216407556189 is 981655704612.

It is a happy number.

216407556189 is a `hidden beast` number, since 2 + 1 + 6 + 4 + 0 + 7 + 556 + 1 + 89 = 666.

It is not a de Polignac number, because 216407556189 - 2³ = 216407556181 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216407556181) 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 23 ways as a sum of consecutive naturals, for example, 1246552 + ... + 1409505.

It is an arithmetic number, because the mean of its divisors is an integer number (14225846648).

Almost surely, 2^216407556189 is an apocalyptic number.

It is an amenable number.

216407556189 is a deficient number, since it is larger than the sum of its proper divisors (125012763363).

216407556189 is a wasteful number, since it uses less digits than its factorization.

216407556189 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2656897 (or 2656894 counting only the distinct ones).

The product of its (nonzero) digits is 3628800, while the sum is 54.

The spelling of 216407556189 in words is "two hundred sixteen billion, four hundred seven million, five hundred fifty-six thousand, one hundred eighty-nine".