12708583781 has 2 divisors, whose sum is σ = 12708583782. Its totient is φ = 12708583780.

The previous prime is 12708583763. The next prime is 12708583787. The reversal of 12708583781 is 18738580721.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10153786756 + 2554797025 = 100766^2 + 50545^2 .

It is a cyclic number.

It is not a de Polignac number, because 12708583781 - 2²⁶ = 12641474917 is a prime.

It is a super-2 number, since 2×12708583781² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12708583787) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6354291890 + 6354291891.

It is an arithmetic number, because the mean of its divisors is an integer number (6354291891).

Almost surely, 2^12708583781 is an apocalyptic number.

It is an amenable number.

12708583781 is a deficient number, since it is larger than the sum of its proper divisors (1).

12708583781 is an equidigital number, since it uses as much as digits as its factorization.

12708583781 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 752640, while the sum is 50.

The spelling of 12708583781 in words is "twelve billion, seven hundred eight million, five hundred eighty-three thousand, seven hundred eighty-one".