16749788407871 has 4 divisors (see below), whose sum is σ = 17024375103144. Its totient is φ = 16475201712600.

The previous prime is 16749788407853. The next prime is 16749788407909. The reversal of 16749788407871 is 17870488794761.

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-16749788407871 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 16749788407792 and 16749788407801.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16749788407801) 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, 137293347545 + ... + 137293347666.

It is an arithmetic number, because the mean of its divisors is an integer number (4256093775786).

Almost surely, 2^{16749788407871} is an apocalyptic number.

16749788407871 is a deficient number, since it is larger than the sum of its proper divisors (274586695273).

16749788407871 is an equidigital number, since it uses as much as digits as its factorization.

16749788407871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 274586695272.

The product of its (nonzero) digits is 1062125568, while the sum is 77.

The spelling of 16749788407871 in words is "sixteen trillion, seven hundred forty-nine billion, seven hundred eighty-eight million, four hundred seven thousand, eight hundred seventy-one".