138838421776 has 40 divisors (see below), whose sum is σ = 269578951200. Its totient is φ = 69269790720.

The previous prime is 138838421767. The next prime is 138838421803. The reversal of 138838421776 is 677124838831.

It is a super-2 number, since 2×138838421776² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 138838421776.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32968311 + ... + 32972521.

It is an arithmetic number, because the mean of its divisors is an integer number (6739473780).

Almost surely, 2^138838421776 is an apocalyptic number.

138838421776 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

138838421776 is a deficient number, since it is larger than the sum of its proper divisors (130740529424).

138838421776 is a wasteful number, since it uses less digits than its factorization.

138838421776 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8167 (or 8161 counting only the distinct ones).

The product of its digits is 10838016, while the sum is 58.

The spelling of 138838421776 in words is "one hundred thirty-eight billion, eight hundred thirty-eight million, four hundred twenty-one thousand, seven hundred seventy-six".