131403354320405 has 4 divisors (see below), whose sum is σ = 157684025184492. Its totient is φ = 105122683456320.

The previous prime is 131403354320369. The next prime is 131403354320423. The reversal of 131403354320405 is 504023453304131.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 87815022515089 + 43588331805316 = 9370967^2 + 6602146^2 .

It is not a de Polignac number, because 131403354320405 - 2⁸ = 131403354320149 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13140335432036 + ... + 13140335432045.

It is an arithmetic number, because the mean of its divisors is an integer number (39421006296123).

Almost surely, 2^{131403354320405} is an apocalyptic number.

It is an amenable number.

131403354320405 is a deficient number, since it is larger than the sum of its proper divisors (26280670864087).

131403354320405 is an equidigital number, since it uses as much as digits as its factorization.

131403354320405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26280670864086.

The product of its (nonzero) digits is 259200, while the sum is 38.

The spelling of 131403354320405 in words is "one hundred thirty-one trillion, four hundred three billion, three hundred fifty-four million, three hundred twenty thousand, four hundred five".