138831277044 has 12 divisors (see below), whose sum is σ = 323939646464. Its totient is φ = 46277092344.

The previous prime is 138831277043. The next prime is 138831277051. The reversal of 138831277044 is 440772138831.

It is a tau number, because it is divible by the number of its divisors (12).

It is a junction number, because it is equal to n+sod(n) for n = 138831276984 and 138831277002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138831277043) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5784636532 + ... + 5784636555.

Almost surely, 2^138831277044 is an apocalyptic number.

It is an amenable number.

138831277044 is an abundant number, since it is smaller than the sum of its proper divisors (185108369420).

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

138831277044 is a wasteful number, since it uses less digits than its factorization.

138831277044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11569273094 (or 11569273092 counting only the distinct ones).

The product of its (nonzero) digits is 903168, while the sum is 48.

The spelling of 138831277044 in words is "one hundred thirty-eight billion, eight hundred thirty-one million, two hundred seventy-seven thousand, forty-four".