131781800111887 has 8 divisors (see below), whose sum is σ = 133645957207056. Its totient is φ = 129919235637312.

The previous prime is 131781800111881. The next prime is 131781800111917. The reversal of 131781800111887 is 788111008187131.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131781800111887 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 (131781800111881) 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 7 ways as a sum of consecutive naturals, for example, 397988488 + ... + 398319469.

It is an arithmetic number, because the mean of its divisors is an integer number (16705744650882).

Almost surely, 2^{131781800111887} is an apocalyptic number.

131781800111887 is a deficient number, since it is larger than the sum of its proper divisors (1864157095169).

131781800111887 is an equidigital number, since it uses as much as digits as its factorization.

131781800111887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 796310297.

The product of its (nonzero) digits is 602112, while the sum is 55.

The spelling of 131781800111887 in words is "one hundred thirty-one trillion, seven hundred eighty-one billion, eight hundred million, one hundred eleven thousand, eight hundred eighty-seven".