138406181160 has 64 divisors (see below), whose sum is σ = 447158436480. Its totient is φ = 34069213440.

The previous prime is 138406181107. The next prime is 138406181167. The reversal of 138406181160 is 61181604831.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (138406181167) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 44359396 + ... + 44362515.

It is an arithmetic number, because the mean of its divisors is an integer number (6986850570).

Almost surely, 2^138406181160 is an apocalyptic number.

138406181160 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

138406181160 is an abundant number, since it is smaller than the sum of its proper divisors (308752255320).

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

138406181160 is a wasteful number, since it uses less digits than its factorization.

138406181160 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88721938 (or 88721934 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 39.

Adding to 138406181160 its reverse (61181604831), we get a palindrome (199587785991).

The spelling of 138406181160 in words is "one hundred thirty-eight billion, four hundred six million, one hundred eighty-one thousand, one hundred sixty".