138955336250 has 40 divisors (see below), whose sum is σ = 274166238720. Its totient is φ = 52656750000.

The previous prime is 138955336237. The next prime is 138955336259. The reversal of 138955336250 is 52633559831.

It is a Harshad number since it is a multiple of its sum of digits (50).

It is not an unprimeable number, because it can be changed into a prime (138955336259) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 2901626 + ... + 2949125.

It is an arithmetic number, because the mean of its divisors is an integer number (6854155968).

Almost surely, 2^138955336250 is an apocalyptic number.

138955336250 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

138955336250 is a deficient number, since it is larger than the sum of its proper divisors (135210902470).

138955336250 is an equidigital number, since it uses as much as digits as its factorization.

138955336250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5850792 (or 5850777 counting only the distinct ones).

The product of its (nonzero) digits is 2916000, while the sum is 50.

The spelling of 138955336250 in words is "one hundred thirty-eight billion, nine hundred fifty-five million, three hundred thirty-six thousand, two hundred fifty".