16681918345901 has 8 divisors (see below), whose sum is σ = 16825087586304. Its totient is φ = 16538933723760.

The previous prime is 16681918345787. The next prime is 16681918345921. The reversal of 16681918345901 is 10954381918661.

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

It is a cyclic number.

It is not a de Polignac number, because 16681918345901 - 2¹⁸ = 16681918083757 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16681918345921) 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, 45973070 + ... + 46334511.

It is an arithmetic number, because the mean of its divisors is an integer number (2103135948288).

Almost surely, 2^{16681918345901} is an apocalyptic number.

It is an amenable number.

16681918345901 is a deficient number, since it is larger than the sum of its proper divisors (143169240403).

16681918345901 is a wasteful number, since it uses less digits than its factorization.

16681918345901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92309131.

The product of its (nonzero) digits is 11197440, while the sum is 62.

The spelling of 16681918345901 in words is "sixteen trillion, six hundred eighty-one billion, nine hundred eighteen million, three hundred forty-five thousand, nine hundred one".