216829380785 has 8 divisors (see below), whose sum is σ = 260212894656. Its totient is φ = 173451746160.

The previous prime is 216829380773. The next prime is 216829380797. The reversal of 216829380785 is 587083928612.

It is an interprime number because it is at equal distance from previous prime (216829380773) and next prime (216829380797).

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

It is not a de Polignac number, because 216829380785 - 2⁸ = 216829380529 is a prime.

It is a Duffinian 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 in 7 ways as a sum of consecutive naturals, for example, 1388261 + ... + 1536530.

It is an arithmetic number, because the mean of its divisors is an integer number (32526611832).

Almost surely, 2^216829380785 is an apocalyptic number.

It is an amenable number.

216829380785 is a deficient number, since it is larger than the sum of its proper divisors (43383513871).

216829380785 is a wasteful number, since it uses less digits than its factorization.

216829380785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2939623.

The product of its (nonzero) digits is 11612160, while the sum is 59.

The spelling of 216829380785 in words is "two hundred sixteen billion, eight hundred twenty-nine million, three hundred eighty thousand, seven hundred eighty-five".