138181833256 has 16 divisors (see below), whose sum is σ = 265410229140. Its totient is φ = 67405772160.

The previous prime is 138181833233. The next prime is 138181833277. The reversal of 138181833256 is 652338181831.

It can be written as a sum of positive squares in 2 ways, for example, as 123880065156 + 14301768100 = 351966^2 + 119590^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 210642711 + ... + 210643366.

Almost surely, 2^138181833256 is an apocalyptic number.

It is an amenable number.

138181833256 is a deficient number, since it is larger than the sum of its proper divisors (127228395884).

138181833256 is a wasteful number, since it uses less digits than its factorization.

138181833256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 421286124 (or 421286120 counting only the distinct ones).

The product of its digits is 829440, while the sum is 49.

The spelling of 138181833256 in words is "one hundred thirty-eight billion, one hundred eighty-one million, eight hundred thirty-three thousand, two hundred fifty-six".