131773635466813 has 4 divisors (see below), whose sum is σ = 134838138617248. Its totient is φ = 128709132316380.

The previous prime is 131773635466799. The next prime is 131773635466849. The reversal of 131773635466813 is 318664536377131.

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 a de Polignac number, because none of the positive numbers 2^k-131773635466813 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 (131773635466013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1532251575153 + ... + 1532251575238.

It is an arithmetic number, because the mean of its divisors is an integer number (33709534654312).

Almost surely, 2^{131773635466813} is an apocalyptic number.

It is an amenable number.

131773635466813 is a deficient number, since it is larger than the sum of its proper divisors (3064503150435).

131773635466813 is an equidigital number, since it uses as much as digits as its factorization.

131773635466813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3064503150434.

The product of its digits is 137168640, while the sum is 64.

The spelling of 131773635466813 in words is "one hundred thirty-one trillion, seven hundred seventy-three billion, six hundred thirty-five million, four hundred sixty-six thousand, eight hundred thirteen".