138163346388 has 36 divisors (see below), whose sum is σ = 350507078740. Its totient is φ = 45888183936.

The previous prime is 138163346383. The next prime is 138163346393. The reversal of 138163346388 is 883643361831.

138163346388 is a `hidden beast` number, since 13 + 8 + 163 + 3 + 463 + 8 + 8 = 666.

It is an interprime number because it is at equal distance from previous prime (138163346383) and next prime (138163346393).

It can be written as a sum of positive squares in 2 ways, for example, as 13301470224 + 124861876164 = 115332^2 + 353358^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×138163346388² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138163346383) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6917593 + ... + 6937536.

Almost surely, 2^138163346388 is an apocalyptic number.

138163346388 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

138163346388 is an abundant number, since it is smaller than the sum of its proper divisors (212343732352).

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

138163346388 is a wasteful number, since it uses less digits than its factorization.

138163346388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13855416 (or 13855411 counting only the distinct ones).

The product of its digits is 5971968, while the sum is 54.

The spelling of 138163346388 in words is "one hundred thirty-eight billion, one hundred sixty-three million, three hundred forty-six thousand, three hundred eighty-eight".