16519703841 has 15 divisors (see below), whose sum is σ = 24679310403. Its totient is φ = 11012364720.

The previous prime is 16519703833. The next prime is 16519703861. The reversal of 16519703841 is 14830791561.

The square root of 16519703841 is 128529.

It is a perfect power (a square), and thus also a powerful number.

16519703841 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 2313441 + 16517390400 = 1521^2 + 128520^2 .

It is not a de Polignac number, because 16519703841 - 2³ = 16519703833 is a prime.

It is a super-2 number, since 2×16519703841² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (16519703821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 1149621 + ... + 1163901.

Almost surely, 2^16519703841 is an apocalyptic number.

16519703841 is the 128529-th square number.

16519703841 is the 64265-th centered octagonal number.

It is an amenable number.

16519703841 is a deficient number, since it is larger than the sum of its proper divisors (8159606562).

16519703841 is an frugal number, since it uses more digits than its factorization.

16519703841 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28574 (or 14284 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 45.

The spelling of 16519703841 in words is "sixteen billion, five hundred nineteen million, seven hundred three thousand, eight hundred forty-one".