338538518885 has 24 divisors (see below), whose sum is σ = 480319241976. Its totient is φ = 228335103360.

The previous prime is 338538518881. The next prime is 338538518909. The reversal of 338538518885 is 588815835833.

It can be written as a sum of positive squares in 4 ways, for example, as 35803073089 + 302735445796 = 189217^2 + 550214^2 .

It is not a de Polignac number, because 338538518885 - 2² = 338538518881 is a prime.

It is a super-2 number, since 2×338538518885² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (338538518881) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11311202 + ... + 11341091.

It is an arithmetic number, because the mean of its divisors is an integer number (20013301749).

Almost surely, 2^338538518885 is an apocalyptic number.

338538518885 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

338538518885 is a deficient number, since it is larger than the sum of its proper divisors (141780723091).

338538518885 is a wasteful number, since it uses less digits than its factorization.

338538518885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22652373 (or 22652366 counting only the distinct ones).

The product of its digits is 110592000, while the sum is 65.

The spelling of 338538518885 in words is "three hundred thirty-eight billion, five hundred thirty-eight million, five hundred eighteen thousand, eight hundred eighty-five".