138404840375 has 8 divisors (see below), whose sum is σ = 172729240944. Its totient is φ = 110723872200.

The previous prime is 138404840323. The next prime is 138404840381. The reversal of 138404840375 is 573048404831.

It is not a de Polignac number, because 138404840375 - 2²⁴ = 138388063159 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 553619237 + ... + 553619486.

It is an arithmetic number, because the mean of its divisors is an integer number (21591155118).

Almost surely, 2^138404840375 is an apocalyptic number.

138404840375 is a deficient number, since it is larger than the sum of its proper divisors (34324400569).

138404840375 is an equidigital number, since it uses as much as digits as its factorization.

138404840375 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1107238738 (or 1107238728 counting only the distinct ones).

The product of its (nonzero) digits is 1290240, while the sum is 47.

The spelling of 138404840375 in words is "one hundred thirty-eight billion, four hundred four million, eight hundred forty thousand, three hundred seventy-five".