12307539271681 has 4 divisors (see below), whose sum is σ = 12307560899652. Its totient is φ = 12307517643712.

The previous prime is 12307539271591. The next prime is 12307539271697. The reversal of 12307539271681 is 18617293570321.

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

It can be written as a sum of positive squares in 2 ways, for example, as 10088348078656 + 2219191193025 = 3176216^2 + 1489695^2 .

It is a cyclic number.

It is not a de Polignac number, because 12307539271681 - 2⁹ = 12307539271169 is a prime.

It is a super-2 number, since 2×12307539271681² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12307539271481) 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, 9936676 + ... + 11106421.

It is an arithmetic number, because the mean of its divisors is an integer number (3076890224913).

Almost surely, 2^{12307539271681} is an apocalyptic number.

It is an amenable number.

12307539271681 is a deficient number, since it is larger than the sum of its proper divisors (21627971).

12307539271681 is an equidigital number, since it uses as much as digits as its factorization.

12307539271681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21627970.

The product of its (nonzero) digits is 3810240, while the sum is 55.

The spelling of 12307539271681 in words is "twelve trillion, three hundred seven billion, five hundred thirty-nine million, two hundred seventy-one thousand, six hundred eighty-one".