16269239185681 has 4 divisors (see below), whose sum is σ = 16647593585392. Its totient is φ = 15890884785972.

The previous prime is 16269239185663. The next prime is 16269239185709. The reversal of 16269239185681 is 18658193296261.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 16269239185681 - 2¹³ = 16269239177489 is a prime.

It is a super-2 number, since 2×16269239185681² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16269239185621) 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, 189177199791 + ... + 189177199876.

It is an arithmetic number, because the mean of its divisors is an integer number (4161898396348).

Almost surely, 2^{16269239185681} is an apocalyptic number.

It is an amenable number.

16269239185681 is a deficient number, since it is larger than the sum of its proper divisors (378354399711).

16269239185681 is an equidigital number, since it uses as much as digits as its factorization.

16269239185681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 378354399710.

The product of its digits is 67184640, while the sum is 67.

The spelling of 16269239185681 in words is "sixteen trillion, two hundred sixty-nine billion, two hundred thirty-nine million, one hundred eighty-five thousand, six hundred eighty-one".