131221440796536 has 96 divisors (see below), whose sum is σ = 371079265115520. Its totient is φ = 41812087521600.

The previous prime is 131221440796531. The next prime is 131221440796591. The reversal of 131221440796536 is 635697044122131.

131221440796536 is a `hidden beast` number, since 1 + 3 + 1 + 2 + 2 + 14 + 4 + 0 + 7 + 96 + 536 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131221440796531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 22618030 + ... + 27821181.

It is an arithmetic number, because the mean of its divisors is an integer number (3865409011620).

Almost surely, 2^{131221440796536} is an apocalyptic number.

It is an amenable number.

131221440796536 is an abundant number, since it is smaller than the sum of its proper divisors (239857824318984).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

131221440796536 is a wasteful number, since it uses less digits than its factorization.

131221440796536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50440817 (or 50440810 counting only the distinct ones).

The product of its (nonzero) digits is 6531840, while the sum is 54.

The spelling of 131221440796536 in words is "one hundred thirty-one trillion, two hundred twenty-one billion, four hundred forty million, seven hundred ninety-six thousand, five hundred thirty-six".