131278378415239 has 24 divisors (see below), whose sum is σ = 147961228398704. Its totient is φ = 116350739366400.

The previous prime is 131278378415083. The next prime is 131278378415243. The reversal of 131278378415239 is 932514873872131.

It is a happy number.

It is not a de Polignac number, because 131278378415239 - 2²³ = 131278370026631 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 (131278378415269) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 82683792 + ... + 84256549.

Almost surely, 2^{131278378415239} is an apocalyptic number.

131278378415239 is a deficient number, since it is larger than the sum of its proper divisors (16682849983465).

131278378415239 is a wasteful number, since it uses less digits than its factorization.

131278378415239 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166940527 (or 166940516 counting only the distinct ones).

The product of its digits is 60963840, while the sum is 64.

The spelling of 131278378415239 in words is "one hundred thirty-one trillion, two hundred seventy-eight billion, three hundred seventy-eight million, four hundred fifteen thousand, two hundred thirty-nine".