16851668501842 has 16 divisors (see below), whose sum is σ = 25655650824960. Its totient is φ = 8299793441808.

The previous prime is 16851668501819. The next prime is 16851668501849. The reversal of 16851668501842 is 24810586615861.

It is not an unprimeable number, because it can be changed into a prime (16851668501849) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1848063 + ... + 6092509.

It is an arithmetic number, because the mean of its divisors is an integer number (1603478176560).

Almost surely, 2^{16851668501842} is an apocalyptic number.

16851668501842 is a deficient number, since it is larger than the sum of its proper divisors (8803982323118).

16851668501842 is a wasteful number, since it uses less digits than its factorization.

16851668501842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4274145.

The product of its (nonzero) digits is 22118400, while the sum is 61.

The spelling of 16851668501842 in words is "sixteen trillion, eight hundred fifty-one billion, six hundred sixty-eight million, five hundred one thousand, eight hundred forty-two".