18016801699806 has 48 divisors (see below), whose sum is σ = 48044804537184. Its totient is φ = 4751683964352.

The previous prime is 18016801699783. The next prime is 18016801699847. The reversal of 18016801699806 is 60899610861081.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 5499632581 + ... + 5499635856.

It is an arithmetic number, because the mean of its divisors is an integer number (1000933427858).

Almost surely, 2^{18016801699806} is an apocalyptic number.

18016801699806 is an abundant number, since it is smaller than the sum of its proper divisors (30028002837378).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18016801699806 is a wasteful number, since it uses less digits than its factorization.

18016801699806 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10999268465 (or 10999268462 counting only the distinct ones).

The product of its (nonzero) digits is 8957952, while the sum is 63.

The spelling of 18016801699806 in words is "eighteen trillion, sixteen billion, eight hundred one million, six hundred ninety-nine thousand, eight hundred six".