338538718687 has 4 divisors (see below), whose sum is σ = 364580158600. Its totient is φ = 312497278776.

The previous prime is 338538718627. The next prime is 338538718697. The reversal of 338538718687 is 786817835833.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 338538718687 - 2¹¹ = 338538716639 is a prime.

It is a super-2 number, since 2×338538718687² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (338538718627) 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, 13020719937 + ... + 13020719962.

It is an arithmetic number, because the mean of its divisors is an integer number (91145039650).

Almost surely, 2^338538718687 is an apocalyptic number.

338538718687 is a deficient number, since it is larger than the sum of its proper divisors (26041439913).

338538718687 is a wasteful number, since it uses less digits than its factorization.

338538718687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26041439912.

The product of its digits is 162570240, while the sum is 67.

The spelling of 338538718687 in words is "three hundred thirty-eight billion, five hundred thirty-eight million, seven hundred eighteen thousand, six hundred eighty-seven".