138444604550 has 48 divisors (see below), whose sum is σ = 299846424672. Its totient is φ = 46571116800.

The previous prime is 138444604547. The next prime is 138444604567. The reversal of 138444604550 is 55406444831.

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, 3713111 + ... + 3750210.

It is an arithmetic number, because the mean of its divisors is an integer number (6246800514).

Almost surely, 2^138444604550 is an apocalyptic number.

138444604550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

138444604550 is an abundant number, since it is smaller than the sum of its proper divisors (161401820122).

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

138444604550 is a wasteful number, since it uses less digits than its factorization.

138444604550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7463393 (or 7463388 counting only the distinct ones).

The product of its (nonzero) digits is 921600, while the sum is 44.

The spelling of 138444604550 in words is "one hundred thirty-eight billion, four hundred forty-four million, six hundred four thousand, five hundred fifty".