138831622780 has 24 divisors (see below), whose sum is σ = 293771958480. Its totient is φ = 55108734720.

The previous prime is 138831622763. The next prime is 138831622801. The reversal of 138831622780 is 87226138831.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26491965 + ... + 26497204.

It is an arithmetic number, because the mean of its divisors is an integer number (12240498270).

Almost surely, 2^138831622780 is an apocalyptic number.

138831622780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

138831622780 is an abundant number, since it is smaller than the sum of its proper divisors (154940335700).

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

138831622780 is a wasteful number, since it uses less digits than its factorization.

138831622780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52989309 (or 52989307 counting only the distinct ones).

The product of its (nonzero) digits is 774144, while the sum is 49.

The spelling of 138831622780 in words is "one hundred thirty-eight billion, eight hundred thirty-one million, six hundred twenty-two thousand, seven hundred eighty".