131464523509 has 4 divisors (see below), whose sum is σ = 143415843840. Its totient is φ = 119513203180.

The previous prime is 131464523507. The next prime is 131464523587. The reversal of 131464523509 is 905325464131.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 131464523509 - 2¹ = 131464523507 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131464523507) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5975660149 + ... + 5975660170.

It is an arithmetic number, because the mean of its divisors is an integer number (35853960960).

Almost surely, 2^131464523509 is an apocalyptic number.

It is an amenable number.

131464523509 is a deficient number, since it is larger than the sum of its proper divisors (11951320331).

131464523509 is a wasteful number, since it uses less digits than its factorization.

131464523509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11951320330.

The product of its (nonzero) digits is 388800, while the sum is 43.

The spelling of 131464523509 in words is "one hundred thirty-one billion, four hundred sixty-four million, five hundred twenty-three thousand, five hundred nine".