131686404854 has 4 divisors (see below), whose sum is σ = 197529607284. Its totient is φ = 65843202426.

The previous prime is 131686404821. The next prime is 131686404859. The reversal of 131686404854 is 458404686131.

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

It is a super-2 number, since 2×131686404854² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131686404859) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32921601212 + ... + 32921601215.

It is an arithmetic number, because the mean of its divisors is an integer number (49382401821).

Almost surely, 2^131686404854 is an apocalyptic number.

131686404854 is a deficient number, since it is larger than the sum of its proper divisors (65843202430).

131686404854 is an equidigital number, since it uses as much as digits as its factorization.

131686404854 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65843202429.

The product of its (nonzero) digits is 2211840, while the sum is 50.

The spelling of 131686404854 in words is "one hundred thirty-one billion, six hundred eighty-six million, four hundred four thousand, eight hundred fifty-four".