131745672673 has 4 divisors (see below), whose sum is σ = 133225961220. Its totient is φ = 130265384128.

The previous prime is 131745672661. The next prime is 131745672689. The reversal of 131745672673 is 376276547131.

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 43828678609 + 87916994064 = 209353^2 + 296508^2 .

It is a cyclic number.

It is not a de Polignac number, because 131745672673 - 2¹⁷ = 131745541601 is a prime.

It is a super-2 number, since 2×131745672673² (a number of 23 digits) contains 22 as substring.

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 131745672673.

It is not an unprimeable number, because it can be changed into a prime (131745672613) 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, 740144140 + ... + 740144317.

It is an arithmetic number, because the mean of its divisors is an integer number (33306490305).

Almost surely, 2^131745672673 is an apocalyptic number.

It is an amenable number.

131745672673 is a deficient number, since it is larger than the sum of its proper divisors (1480288547).

131745672673 is an equidigital number, since it uses as much as digits as its factorization.

131745672673 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1480288546.

The product of its digits is 4445280, while the sum is 52.

The spelling of 131745672673 in words is "one hundred thirty-one billion, seven hundred forty-five million, six hundred seventy-two thousand, six hundred seventy-three".