12671320537 has 2 divisors, whose sum is σ = 12671320538. Its totient is φ = 12671320536.

The previous prime is 12671320499. The next prime is 12671320603. The reversal of 12671320537 is 73502317621.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9805752576 + 2865567961 = 99024^2 + 53531^2 .

It is a cyclic number.

It is not a de Polignac number, because 12671320537 - 2¹¹ = 12671318489 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12671320496 and 12671320505.

It is not a weakly prime, because it can be changed into another prime (12671320037) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6335660268 + 6335660269.

It is an arithmetic number, because the mean of its divisors is an integer number (6335660269).

Almost surely, 2^12671320537 is an apocalyptic number.

It is an amenable number.

12671320537 is a deficient number, since it is larger than the sum of its proper divisors (1).

12671320537 is an equidigital number, since it uses as much as digits as its factorization.

12671320537 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 52920, while the sum is 37.

The spelling of 12671320537 in words is "twelve billion, six hundred seventy-one million, three hundred twenty thousand, five hundred thirty-seven".