131278112639 has 8 divisors (see below), whose sum is σ = 131712808320. Its totient is φ = 130844087200.

The previous prime is 131278112611. The next prime is 131278112687. The reversal of 131278112639 is 936211872131.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131278112639 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 131278112639.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131278112939) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 226349 + ... + 560169.

It is an arithmetic number, because the mean of its divisors is an integer number (16464101040).

Almost surely, 2^131278112639 is an apocalyptic number.

131278112639 is a deficient number, since it is larger than the sum of its proper divisors (434695681).

131278112639 is an equidigital number, since it uses as much as digits as its factorization.

131278112639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 335121.

The product of its digits is 108864, while the sum is 44.

The spelling of 131278112639 in words is "one hundred thirty-one billion, two hundred seventy-eight million, one hundred twelve thousand, six hundred thirty-nine".