216916171382 has 4 divisors (see below), whose sum is σ = 325374257076. Its totient is φ = 108458085690.

The previous prime is 216916171363. The next prime is 216916171411. The reversal of 216916171382 is 283171619612.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 54229042844 + ... + 54229042847.

It is an arithmetic number, because the mean of its divisors is an integer number (81343564269).

Almost surely, 2^216916171382 is an apocalyptic number.

216916171382 is a deficient number, since it is larger than the sum of its proper divisors (108458085694).

216916171382 is a wasteful number, since it uses less digits than its factorization.

216916171382 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108458085693.

The product of its digits is 217728, while the sum is 47.

The spelling of 216916171382 in words is "two hundred sixteen billion, nine hundred sixteen million, one hundred seventy-one thousand, three hundred eighty-two".