138277381360 has 20 divisors (see below), whose sum is σ = 321494911848. Its totient is φ = 55310952512.

The previous prime is 138277381273. The next prime is 138277381369. The reversal of 138277381360 is 63183772831.

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138277381369) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 864233554 + ... + 864233713.

Almost surely, 2^138277381360 is an apocalyptic number.

138277381360 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

138277381360 is an abundant number, since it is smaller than the sum of its proper divisors (183217530488).

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

138277381360 is a wasteful number, since it uses less digits than its factorization.

138277381360 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1728467280 (or 1728467274 counting only the distinct ones).

The product of its (nonzero) digits is 1016064, while the sum is 49.

The spelling of 138277381360 in words is "one hundred thirty-eight billion, two hundred seventy-seven million, three hundred eighty-one thousand, three hundred sixty".