131365415656 has 8 divisors (see below), whose sum is σ = 246310154370. Its totient is φ = 65682707824.

The previous prime is 131365415627. The next prime is 131365415743. The reversal of 131365415656 is 656514563131.

It can be written as a sum of positive squares in only one way, i.e., 130851486756 + 513928900 = 361734^2 + 22670^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8210338471 + ... + 8210338486.

Almost surely, 2^131365415656 is an apocalyptic number.

It is an amenable number.

131365415656 is a deficient number, since it is larger than the sum of its proper divisors (114944738714).

131365415656 is a wasteful number, since it uses less digits than its factorization.

131365415656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16420676963 (or 16420676959 counting only the distinct ones).

The product of its digits is 972000, while the sum is 46.

Adding to 131365415656 its reverse (656514563131), we get a palindrome (787879978787).

The spelling of 131365415656 in words is "one hundred thirty-one billion, three hundred sixty-five million, four hundred fifteen thousand, six hundred fifty-six".