131840918673 has 4 divisors (see below), whose sum is σ = 175787891568. Its totient is φ = 87893945780.

The previous prime is 131840918641. The next prime is 131840918681. The reversal of 131840918673 is 376819048131.

It is a happy number.

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 131840918673 - 2⁵ = 131840918641 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (131840916673) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21973486443 + ... + 21973486448.

It is an arithmetic number, because the mean of its divisors is an integer number (43946972892).

Almost surely, 2^131840918673 is an apocalyptic number.

It is an amenable number.

131840918673 is a deficient number, since it is larger than the sum of its proper divisors (43946972895).

131840918673 is an equidigital number, since it uses as much as digits as its factorization.

131840918673 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43946972894.

The product of its (nonzero) digits is 870912, while the sum is 51.

The spelling of 131840918673 in words is "one hundred thirty-one billion, eight hundred forty million, nine hundred eighteen thousand, six hundred seventy-three".