131689329520 has 40 divisors (see below), whose sum is σ = 349917362784. Its totient is φ = 45150627072.

The previous prime is 131689329509. The next prime is 131689329523. The reversal of 131689329520 is 25923986131.

131689329520 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131689329523) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 117579199 + ... + 117580318.

Almost surely, 2^131689329520 is an apocalyptic number.

131689329520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

131689329520 is an abundant number, since it is smaller than the sum of its proper divisors (218228033264).

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

131689329520 is a wasteful number, since it uses less digits than its factorization.

131689329520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 235159537 (or 235159531 counting only the distinct ones).

The product of its (nonzero) digits is 699840, while the sum is 49.

The spelling of 131689329520 in words is "one hundred thirty-one billion, six hundred eighty-nine million, three hundred twenty-nine thousand, five hundred twenty".