131201665761 has 8 divisors (see below), whose sum is σ = 175841956960. Its totient is φ = 87014575872.

The previous prime is 131201665709. The next prime is 131201665787. The reversal of 131201665761 is 167566102131.

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

It is not a de Polignac number, because 131201665761 - 2⁹ = 131201665249 is a prime.

It is a super-2 number, since 2×131201665761² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131201665061) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 113299651 + ... + 113300808.

It is an arithmetic number, because the mean of its divisors is an integer number (21980244620).

Almost surely, 2^131201665761 is an apocalyptic number.

It is an amenable number.

131201665761 is a deficient number, since it is larger than the sum of its proper divisors (44640291199).

131201665761 is a wasteful number, since it uses less digits than its factorization.

131201665761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 226600655.

The product of its (nonzero) digits is 45360, while the sum is 39.

Adding to 131201665761 its reverse (167566102131), we get a palindrome (298767767892).

The spelling of 131201665761 in words is "one hundred thirty-one billion, two hundred one million, six hundred sixty-five thousand, seven hundred sixty-one".