138945134374871 has 16 divisors (see below), whose sum is σ = 152477395809408. Its totient is φ = 125564724837600.

The previous prime is 138945134374853. The next prime is 138945134374889. The reversal of 138945134374871 is 178473431549831.

It is an interprime number because it is at equal distance from previous prime (138945134374853) and next prime (138945134374889).

It is a cyclic number.

It is not a de Polignac number, because 138945134374871 - 2¹⁰ = 138945134373847 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138945134344871) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 40976525 + ... + 44237606.

It is an arithmetic number, because the mean of its divisors is an integer number (9529837238088).

Almost surely, 2^{138945134374871} is an apocalyptic number.

138945134374871 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

138945134374871 is a deficient number, since it is larger than the sum of its proper divisors (13532261434537).

138945134374871 is a wasteful number, since it uses less digits than its factorization.

138945134374871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85215022.

The product of its digits is 243855360, while the sum is 68.

The spelling of 138945134374871 in words is "one hundred thirty-eight trillion, nine hundred forty-five billion, one hundred thirty-four million, three hundred seventy-four thousand, eight hundred seventy-one".