216949942188 has 84 divisors (see below), whose sum is σ = 650552288400. Its totient is φ = 61985691936.

The previous prime is 216949942159. The next prime is 216949942211. The reversal of 216949942188 is 881249949612.

216949942188 is a `hidden beast` number, since 2 + 1 + 69 + 499 + 4 + 2 + 1 + 88 = 666.

216949942188 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (84).

It is a Harshad number since it is a multiple of its sum of digits (63).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 5293863 + ... + 5334686.

It is an arithmetic number, because the mean of its divisors is an integer number (7744670100).

Almost surely, 2^216949942188 is an apocalyptic number.

216949942188 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

216949942188 is an abundant number, since it is smaller than the sum of its proper divisors (433602346212).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

216949942188 is a wasteful number, since it uses less digits than its factorization.

216949942188 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10628578 (or 10628561 counting only the distinct ones).

The product of its digits is 17915904, while the sum is 63.

The spelling of 216949942188 in words is "two hundred sixteen billion, nine hundred forty-nine million, nine hundred forty-two thousand, one hundred eighty-eight".