138140837168 has 40 divisors (see below), whose sum is σ = 275479183680. Its totient is φ = 67078103040.

The previous prime is 138140837167. The next prime is 138140837249. The reversal of 138140837168 is 861738041831.

It is not an unprimeable number, because it can be changed into a prime (138140837167) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 818705 + ... + 972912.

It is an arithmetic number, because the mean of its divisors is an integer number (6886979592).

Almost surely, 2^138140837168 is an apocalyptic number.

It is an amenable number.

138140837168 is a deficient number, since it is larger than the sum of its proper divisors (137338346512).

138140837168 is a wasteful number, since it uses less digits than its factorization.

138140837168 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1791765 (or 1791759 counting only the distinct ones).

The product of its (nonzero) digits is 774144, while the sum is 50.

Adding to 138140837168 its reverse (861738041831), we get a palindrome (999878878999).

The spelling of 138140837168 in words is "one hundred thirty-eight billion, one hundred forty million, eight hundred thirty-seven thousand, one hundred sixty-eight".