16856615121110 has 8 divisors (see below), whose sum is σ = 30341907218016. Its totient is φ = 6742646048440.

The previous prime is 16856615121109. The next prime is 16856615121113. The reversal of 16856615121110 is 1112151665861.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16856615121113) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 842830756046 + ... + 842830756065.

It is an arithmetic number, because the mean of its divisors is an integer number (3792738402252).

Almost surely, 2^{16856615121110} is an apocalyptic number.

16856615121110 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

16856615121110 is a deficient number, since it is larger than the sum of its proper divisors (13485292096906).

16856615121110 is a wasteful number, since it uses less digits than its factorization.

16856615121110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1685661512118.

The product of its (nonzero) digits is 86400, while the sum is 44.

Adding to 16856615121110 its reverse (1112151665861), we get a palindrome (17968766786971).

The spelling of 16856615121110 in words is "sixteen trillion, eight hundred fifty-six billion, six hundred fifteen million, one hundred twenty-one thousand, one hundred ten".