131881716607 has 4 divisors (see below), whose sum is σ = 131899738096. Its totient is φ = 131863695120.

The previous prime is 131881716541. The next prime is 131881716611. The reversal of 131881716607 is 706617188131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 706617188131 = 565553 ⋅1249427.

It is a cyclic number.

It is not a de Polignac number, because 131881716607 - 2³¹ = 129734232959 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 (131881716667) by changing a digit.

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, 8999763 + ... + 9014404.

It is an arithmetic number, because the mean of its divisors is an integer number (32974934524).

Almost surely, 2^131881716607 is an apocalyptic number.

131881716607 is a deficient number, since it is larger than the sum of its proper divisors (18021489).

131881716607 is an equidigital number, since it uses as much as digits as its factorization.

131881716607 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18021488.

The product of its (nonzero) digits is 338688, while the sum is 49.

The spelling of 131881716607 in words is "one hundred thirty-one billion, eight hundred eighty-one million, seven hundred sixteen thousand, six hundred seven".