138426250550 has 24 divisors (see below), whose sum is σ = 294254659056. Its totient is φ = 47460428640.

The previous prime is 138426250537. The next prime is 138426250607. The reversal of 138426250550 is 55052624831.

138426250550 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 = 138426250498 and 138426250507.

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 11 ways as a sum of consecutive naturals, for example, 197751437 + ... + 197752136.

It is an arithmetic number, because the mean of its divisors is an integer number (12260610794).

Almost surely, 2^138426250550 is an apocalyptic number.

138426250550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

138426250550 is an abundant number, since it is smaller than the sum of its proper divisors (155828408506).

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

138426250550 is a wasteful number, since it uses less digits than its factorization.

138426250550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 395503592 (or 395503587 counting only the distinct ones).

The product of its (nonzero) digits is 288000, while the sum is 41.

The spelling of 138426250550 in words is "one hundred thirty-eight billion, four hundred twenty-six million, two hundred fifty thousand, five hundred fifty".