131978375499 has 8 divisors (see below), whose sum is σ = 176493338320. Its totient is φ = 87724498176.

The previous prime is 131978375437. The next prime is 131978375509. The reversal of 131978375499 is 994573879131.

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

It is not a de Polignac number, because 131978375499 - 2⁷ = 131978375371 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131978375999) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 65270194 + ... + 65272215.

It is an arithmetic number, because the mean of its divisors is an integer number (22061667290).

Almost surely, 2^131978375499 is an apocalyptic number.

131978375499 is a deficient number, since it is larger than the sum of its proper divisors (44514962821).

131978375499 is a wasteful number, since it uses less digits than its factorization.

131978375499 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130542749.

The product of its digits is 51438240, while the sum is 66.

The spelling of 131978375499 in words is "one hundred thirty-one billion, nine hundred seventy-eight million, three hundred seventy-five thousand, four hundred ninety-nine".