138158559950 has 48 divisors (see below), whose sum is σ = 257969533536. Its totient is φ = 55049779200.

The previous prime is 138158559943. The next prime is 138158559977. The reversal of 138158559950 is 59955851831.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 138158559950.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 45430430 + ... + 45433470.

It is an arithmetic number, because the mean of its divisors is an integer number (5374365282).

Almost surely, 2^138158559950 is an apocalyptic number.

138158559950 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

138158559950 is a deficient number, since it is larger than the sum of its proper divisors (119810973586).

138158559950 is a wasteful number, since it uses less digits than its factorization.

138158559950 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6269 (or 6264 counting only the distinct ones).

The product of its (nonzero) digits is 9720000, while the sum is 59.

The spelling of 138158559950 in words is "one hundred thirty-eight billion, one hundred fifty-eight million, five hundred fifty-nine thousand, nine hundred fifty".