16801128398543 has 4 divisors (see below), whose sum is σ = 16803985253328. Its totient is φ = 16798271543760.

The previous prime is 16801128398533. The next prime is 16801128398563. The reversal of 16801128398543 is 34589382110861.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16801128398543 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 (16801128398533) 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, 1428418571 + ... + 1428430332.

It is an arithmetic number, because the mean of its divisors is an integer number (4200996313332).

Almost surely, 2^{16801128398543} is an apocalyptic number.

16801128398543 is a deficient number, since it is larger than the sum of its proper divisors (2856854785).

16801128398543 is an equidigital number, since it uses as much as digits as its factorization.

16801128398543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2856854784.

The product of its (nonzero) digits is 9953280, while the sum is 59.

The spelling of 16801128398543 in words is "sixteen trillion, eight hundred one billion, one hundred twenty-eight million, three hundred ninety-eight thousand, five hundred forty-three".