131978371927797 has 24 divisors (see below), whose sum is σ = 200669445974400. Its totient is φ = 83354521799808.

The previous prime is 131978371927783. The next prime is 131978371927817. The reversal of 131978371927797 is 797729173879131.

131978371927797 is a `hidden beast` number, since 1 + 3 + 1 + 9 + 7 + 8 + 371 + 92 + 77 + 97 = 666.

It is not a de Polignac number, because 131978371927797 - 2⁶ = 131978371927733 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131978371927777) 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, 73075453 + ... + 74859725.

It is an arithmetic number, because the mean of its divisors is an integer number (8361226915600).

Almost surely, 2^{131978371927797} is an apocalyptic number.

It is an amenable number.

131978371927797 is a deficient number, since it is larger than the sum of its proper divisors (68691074046603).

131978371927797 is a wasteful number, since it uses less digits than its factorization.

131978371927797 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2216857 (or 2216854 counting only the distinct ones).

The product of its digits is 1764331632, while the sum is 81.

The spelling of 131978371927797 in words is "one hundred thirty-one trillion, nine hundred seventy-eight billion, three hundred seventy-one million, nine hundred twenty-seven thousand, seven hundred ninety-seven".