131395581987 has 16 divisors (see below), whose sum is σ = 179372738688. Its totient is φ = 85510111680.

The previous prime is 131395581971. The next prime is 131395582037. The reversal of 131395581987 is 789185593131.

It is not a de Polignac number, because 131395581987 - 2⁴ = 131395581971 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 131395581987.

It is not an unprimeable number, because it can be changed into a prime (131395581937) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 73314 + ... + 517847.

It is an arithmetic number, because the mean of its divisors is an integer number (11210796168).

Almost surely, 2^131395581987 is an apocalyptic number.

131395581987 is a deficient number, since it is larger than the sum of its proper divisors (47977156701).

131395581987 is a wasteful number, since it uses less digits than its factorization.

131395581987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 592930.

The product of its digits is 8164800, while the sum is 60.

The spelling of 131395581987 in words is "one hundred thirty-one billion, three hundred ninety-five million, five hundred eighty-one thousand, nine hundred eighty-seven".