338789767681 has 4 divisors (see below), whose sum is σ = 341787907332. Its totient is φ = 335791628032.

The previous prime is 338789767597. The next prime is 338789767703. The reversal of 338789767681 is 186767987833.

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 31079927025 + 307709840656 = 176295^2 + 554716^2 .

It is a cyclic number.

It is not a de Polignac number, because 338789767681 - 2¹⁹ = 338789243393 is a prime.

It is a super-2 number, since 2×338789767681² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (338789767081) 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 3 ways as a sum of consecutive naturals, for example, 1499069656 + ... + 1499069881.

It is an arithmetic number, because the mean of its divisors is an integer number (85446976833).

Almost surely, 2^338789767681 is an apocalyptic number.

It is an amenable number.

338789767681 is a deficient number, since it is larger than the sum of its proper divisors (2998139651).

338789767681 is a wasteful number, since it uses less digits than its factorization.

338789767681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2998139650.

The product of its digits is 512096256, while the sum is 73.

The spelling of 338789767681 in words is "three hundred thirty-eight billion, seven hundred eighty-nine million, seven hundred sixty-seven thousand, six hundred eighty-one".