131285324669520 has 80 divisors (see below), whose sum is σ = 465125150263680. Its totient is φ = 30008074209792.

The previous prime is 131285324669507. The next prime is 131285324669573. The reversal of 131285324669520 is 25966423582131.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39073011615 + ... + 39073014974.

It is an arithmetic number, because the mean of its divisors is an integer number (5814064378296).

Almost surely, 2^{131285324669520} is an apocalyptic number.

131285324669520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

131285324669520 is an abundant number, since it is smaller than the sum of its proper divisors (333839825594160).

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

131285324669520 is a wasteful number, since it uses less digits than its factorization.

131285324669520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78146026612 (or 78146026606 counting only the distinct ones).

The product of its (nonzero) digits is 18662400, while the sum is 57.

The spelling of 131285324669520 in words is "one hundred thirty-one trillion, two hundred eighty-five billion, three hundred twenty-four million, six hundred sixty-nine thousand, five hundred twenty".