138000388856 has 32 divisors (see below), whose sum is σ = 282288268080. Its totient is φ = 62724172800.

The previous prime is 138000388789. The next prime is 138000388891. The reversal of 138000388856 is 658883000831.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 2658026 + ... + 2709446.

Almost surely, 2^138000388856 is an apocalyptic number.

It is an amenable number.

138000388856 is an abundant number, since it is smaller than the sum of its proper divisors (144287879224).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

138000388856 is a wasteful number, since it uses less digits than its factorization.

138000388856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81935 (or 81931 counting only the distinct ones).

The product of its (nonzero) digits is 1105920, while the sum is 50.

The spelling of 138000388856 in words is "one hundred thirty-eight billion, three hundred eighty-eight thousand, eight hundred fifty-six".