131543814565409 has 2 divisors, whose sum is σ = 131543814565410. Its totient is φ = 131543814565408.

The previous prime is 131543814565363. The next prime is 131543814565439. The reversal of 131543814565409 is 904565418345131.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 117429667231009 + 14114147334400 = 10836497^2 + 3756880^2 .

It is a cyclic number.

It is not a de Polignac number, because 131543814565409 - 2²⁰ = 131543813516833 is a prime.

It is not a weakly prime, because it can be changed into another prime (131543814565439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65771907282704 + 65771907282705.

It is an arithmetic number, because the mean of its divisors is an integer number (65771907282705).

Almost surely, 2^{131543814565409} is an apocalyptic number.

It is an amenable number.

131543814565409 is a deficient number, since it is larger than the sum of its proper divisors (1).

131543814565409 is an equidigital number, since it uses as much as digits as its factorization.

131543814565409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 31104000, while the sum is 59.

The spelling of 131543814565409 in words is "one hundred thirty-one trillion, five hundred forty-three billion, eight hundred fourteen million, five hundred sixty-five thousand, four hundred nine".