138758635256 has 16 divisors (see below), whose sum is σ = 260489350440. Its totient is φ = 69294808480.

The previous prime is 138758635247. The next prime is 138758635291. The reversal of 138758635256 is 652536857831.

138758635256 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 138758635195 and 138758635204.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10556666 + ... + 10569801.

Almost surely, 2^138758635256 is an apocalyptic number.

It is an amenable number.

138758635256 is a deficient number, since it is larger than the sum of its proper divisors (121730715184).

138758635256 is a wasteful number, since it uses less digits than its factorization.

138758635256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21127294 (or 21127290 counting only the distinct ones).

The product of its digits is 36288000, while the sum is 59.

The spelling of 138758635256 in words is "one hundred thirty-eight billion, seven hundred fifty-eight million, six hundred thirty-five thousand, two hundred fifty-six".