131887153617 has 4 divisors (see below), whose sum is σ = 175849538160. Its totient is φ = 87924769076.

The previous prime is 131887153537. The next prime is 131887153631. The reversal of 131887153617 is 716351788131.

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 131887153617 - 2⁸ = 131887153361 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 131887153617.

It is not an unprimeable number, because it can be changed into a prime (131887153667) 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, 21981192267 + ... + 21981192272.

It is an arithmetic number, because the mean of its divisors is an integer number (43962384540).

Almost surely, 2^131887153617 is an apocalyptic number.

It is an amenable number.

131887153617 is a deficient number, since it is larger than the sum of its proper divisors (43962384543).

131887153617 is an equidigital number, since it uses as much as digits as its factorization.

131887153617 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43962384542.

The product of its digits is 846720, while the sum is 51.

The spelling of 131887153617 in words is "one hundred thirty-one billion, eight hundred eighty-seven million, one hundred fifty-three thousand, six hundred seventeen".