16339857823081 has 27 divisors (see below), whose sum is σ = 17829632652741. Its totient is φ = 14967741301344.

The previous prime is 16339857823073. The next prime is 16339857823141. The reversal of 16339857823081 is 18032875893361.

The square root of 16339857823081 is 4042259.

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

It can be written as a sum of positive squares in 4 ways, for example, as 90896823081 + 16248961000000 = 301491^2 + 4031000^2 .

It is not a de Polignac number, because 16339857823081 - 2³ = 16339857823073 is a prime.

It is a super-2 number, since 2×16339857823081² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (16339857823021) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 7304360895 + ... + 7304363131.

Almost surely, 2^{16339857823081} is an apocalyptic number.

16339857823081 is the 4042259-th square number.

16339857823081 is the 2021130-th centered octagonal number.

It is an amenable number.

16339857823081 is a deficient number, since it is larger than the sum of its proper divisors (1489774829660).

16339857823081 is an frugal number, since it uses more digits than its factorization.

16339857823081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4778 (or 2389 counting only the distinct ones).

The product of its (nonzero) digits is 52254720, while the sum is 64.

The spelling of 16339857823081 in words is "sixteen trillion, three hundred thirty-nine billion, eight hundred fifty-seven million, eight hundred twenty-three thousand, eighty-one".