138041950956 has 96 divisors (see below), whose sum is σ = 403147476480. Its totient is φ = 35789589504.

The previous prime is 138041950951. The next prime is 138041950957. The reversal of 138041950956 is 659059140831.

It is a junction number, because it is equal to n+sod(n) for n = 138041950899 and 138041950908.

It is not an unprimeable number, because it can be changed into a prime (138041950951) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1006861 + ... + 1135716.

It is an arithmetic number, because the mean of its divisors is an integer number (4199452880).

Almost surely, 2^138041950956 is an apocalyptic number.

It is an amenable number.

138041950956 is an abundant number, since it is smaller than the sum of its proper divisors (265105525524).

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

138041950956 is a wasteful number, since it uses less digits than its factorization.

138041950956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2142663 (or 2142661 counting only the distinct ones).

The product of its (nonzero) digits is 1166400, while the sum is 51.

The spelling of 138041950956 in words is "one hundred thirty-eight billion, forty-one million, nine hundred fifty thousand, nine hundred fifty-six".