131660564351 has 4 divisors (see below), whose sum is σ = 133892099400. Its totient is φ = 129429029304.

The previous prime is 131660564333. The next prime is 131660564363. The reversal of 131660564351 is 153465066131.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131660564351 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 131660564299 and 131660564308.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131660564251) 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, 1115767436 + ... + 1115767553.

It is an arithmetic number, because the mean of its divisors is an integer number (33473024850).

Almost surely, 2^131660564351 is an apocalyptic number.

131660564351 is a deficient number, since it is larger than the sum of its proper divisors (2231535049).

131660564351 is an equidigital number, since it uses as much as digits as its factorization.

131660564351 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2231535048.

The product of its (nonzero) digits is 194400, while the sum is 41.

The spelling of 131660564351 in words is "one hundred thirty-one billion, six hundred sixty million, five hundred sixty-four thousand, three hundred fifty-one".