138939518950 has 48 divisors (see below), whose sum is σ = 269712737280. Its totient is φ = 53149759520.

The previous prime is 138939518941. The next prime is 138939518951. The reversal of 138939518950 is 59815939831.

138939518950 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138939518951) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 11584857 + ... + 11596843.

It is an arithmetic number, because the mean of its divisors is an integer number (5619015360).

Almost surely, 2^138939518950 is an apocalyptic number.

138939518950 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

138939518950 is a deficient number, since it is larger than the sum of its proper divisors (130773218330).

138939518950 is a wasteful number, since it uses less digits than its factorization.

138939518950 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22101 (or 22096 counting only the distinct ones).

The product of its (nonzero) digits is 10497600, while the sum is 61.

The spelling of 138939518950 in words is "one hundred thirty-eight billion, nine hundred thirty-nine million, five hundred eighteen thousand, nine hundred fifty".