16557051056317 has 4 divisors (see below), whose sum is σ = 16828478122876. Its totient is φ = 16285623989760.

The previous prime is 16557051056197. The next prime is 16557051056339. The reversal of 16557051056317 is 71365015075561.

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 9315064139481 + 7241986916836 = 3052059^2 + 2691094^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16557051056317 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 (16557051056347) 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, 135713533188 + ... + 135713533309.

It is an arithmetic number, because the mean of its divisors is an integer number (4207119530719).

Almost surely, 2^{16557051056317} is an apocalyptic number.

It is an amenable number.

16557051056317 is a deficient number, since it is larger than the sum of its proper divisors (271427066559).

16557051056317 is an equidigital number, since it uses as much as digits as its factorization.

16557051056317 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 271427066558.

The product of its (nonzero) digits is 3307500, while the sum is 52.

The spelling of 16557051056317 in words is "sixteen trillion, five hundred fifty-seven billion, fifty-one million, fifty-six thousand, three hundred seventeen".