16817485771242 has 96 divisors (see below), whose sum is σ = 40315238872272. Its totient is φ = 5033023091712.

The previous prime is 16817485771231. The next prime is 16817485771291. The reversal of 16817485771242 is 24217758471861.

It is a happy number.

16817485771242 is a `hidden beast` number, since 1 + 6 + 8 + 1 + 7 + 4 + 8 + 577 + 12 + 42 = 666.

It can be written as a sum of positive squares in 8 ways, for example, as 12892415541201 + 3925070230041 = 3590601^2 + 1981179^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 16817485771242.

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 47 ways as a sum of consecutive naturals, for example, 24922438 + ... + 25588334.

Almost surely, 2^{16817485771242} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16817485771242, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20157619436136).

16817485771242 is an abundant number, since it is smaller than the sum of its proper divisors (23497753101030).

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

16817485771242 is a wasteful number, since it uses less digits than its factorization.

16817485771242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 668872 (or 668869 counting only the distinct ones).

The product of its digits is 42147840, while the sum is 63.

The spelling of 16817485771242 in words is "sixteen trillion, eight hundred seventeen billion, four hundred eighty-five million, seven hundred seventy-one thousand, two hundred forty-two".