16971889139713 has 4 divisors (see below), whose sum is σ = 17122082849028. Its totient is φ = 16821695430400.

The previous prime is 16971889139671. The next prime is 16971889139743. The reversal of 16971889139713 is 31793198817961.

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

It can be written as a sum of positive squares in 2 ways, for example, as 8003738911744 + 8968150227969 = 2829088^2 + 2994687^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16971889139713 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16971889139743) 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, 75096854488 + ... + 75096854713.

It is an arithmetic number, because the mean of its divisors is an integer number (4280520712257).

Almost surely, 2^{16971889139713} is an apocalyptic number.

It is an amenable number.

16971889139713 is a deficient number, since it is larger than the sum of its proper divisors (150193709315).

16971889139713 is a wasteful number, since it uses less digits than its factorization.

16971889139713 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 150193709314.

The product of its digits is 123451776, while the sum is 73.

The spelling of 16971889139713 in words is "sixteen trillion, nine hundred seventy-one billion, eight hundred eighty-nine million, one hundred thirty-nine thousand, seven hundred thirteen".