131505456509 has 8 divisors (see below), whose sum is σ = 150321078528. Its totient is φ = 112697116560.

The previous prime is 131505456463. The next prime is 131505456541. The reversal of 131505456509 is 905654505131.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 131505456509 - 2¹² = 131505452413 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 131505456509.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131505456569) 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, 1781762 + ... + 1854099.

It is an arithmetic number, because the mean of its divisors is an integer number (18790134816).

Almost surely, 2^131505456509 is an apocalyptic number.

It is an amenable number.

131505456509 is a deficient number, since it is larger than the sum of its proper divisors (18815622019).

131505456509 is an equidigital number, since it uses as much as digits as its factorization.

131505456509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3641035.

The product of its (nonzero) digits is 405000, while the sum is 44.

The spelling of 131505456509 in words is "one hundred thirty-one billion, five hundred five million, four hundred fifty-six thousand, five hundred nine".