131745724520 has 32 divisors (see below), whose sum is σ = 297832770720. Its totient is φ = 52448531520.

The previous prime is 131745724469. The next prime is 131745724529. The reversal of 131745724520 is 25427547131.

It is not an unprimeable number, because it can be changed into a prime (131745724529) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7796402 + ... + 7813281.

It is an arithmetic number, because the mean of its divisors is an integer number (9307274085).

Almost surely, 2^131745724520 is an apocalyptic number.

131745724520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

131745724520 is an abundant number, since it is smaller than the sum of its proper divisors (166087046200).

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

131745724520 is a wasteful number, since it uses less digits than its factorization.

131745724520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15609905 (or 15609901 counting only the distinct ones).

The product of its (nonzero) digits is 235200, while the sum is 41.

The spelling of 131745724520 in words is "one hundred thirty-one billion, seven hundred forty-five million, seven hundred twenty-four thousand, five hundred twenty".