138782468271 has 4 divisors (see below), whose sum is σ = 185043291032. Its totient is φ = 92521645512.

The previous prime is 138782468269. The next prime is 138782468317. The reversal of 138782468271 is 172864287831.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 138782468271 - 2¹ = 138782468269 is a prime.

It is a super-2 number, since 2×138782468271² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138792468271) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23130411376 + ... + 23130411381.

It is an arithmetic number, because the mean of its divisors is an integer number (46260822758).

Almost surely, 2^138782468271 is an apocalyptic number.

138782468271 is a deficient number, since it is larger than the sum of its proper divisors (46260822761).

138782468271 is an equidigital number, since it uses as much as digits as its factorization.

138782468271 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46260822760.

The product of its digits is 7225344, while the sum is 57.

The spelling of 138782468271 in words is "one hundred thirty-eight billion, seven hundred eighty-two million, four hundred sixty-eight thousand, two hundred seventy-one".