131566060341509 has 4 divisors (see below), whose sum is σ = 131945213253504. Its totient is φ = 131186907429516.

The previous prime is 131566060341481. The next prime is 131566060341517. The reversal of 131566060341509 is 905143060665131.

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 131566060341509 - 2⁸ = 131566060341253 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 (131566060341409) 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, 189576455477 + ... + 189576456170.

It is an arithmetic number, because the mean of its divisors is an integer number (32986303313376).

Almost surely, 2^{131566060341509} is an apocalyptic number.

It is an amenable number.

131566060341509 is a deficient number, since it is larger than the sum of its proper divisors (379152911995).

131566060341509 is an equidigital number, since it uses as much as digits as its factorization.

131566060341509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 379152911994.

The product of its (nonzero) digits is 1749600, while the sum is 50.

The spelling of 131566060341509 in words is "one hundred thirty-one trillion, five hundred sixty-six billion, sixty million, three hundred forty-one thousand, five hundred nine".