138914538646 has 16 divisors (see below), whose sum is σ = 224417166624. Its totient is φ = 64109614464.

The previous prime is 138914538613. The next prime is 138914538647. The reversal of 138914538646 is 646835419831.

138914538646 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138914538647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 168135 + ... + 553261.

It is an arithmetic number, because the mean of its divisors is an integer number (14026072914).

Almost surely, 2^138914538646 is an apocalyptic number.

138914538646 is a deficient number, since it is larger than the sum of its proper divisors (85502627978).

138914538646 is a wasteful number, since it uses less digits than its factorization.

138914538646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 399015.

The product of its digits is 14929920, while the sum is 58.

The spelling of 138914538646 in words is "one hundred thirty-eight billion, nine hundred fourteen million, five hundred thirty-eight thousand, six hundred forty-six".