12929434686481 has 2 divisors, whose sum is σ = 12929434686482. Its totient is φ = 12929434686480.

The previous prime is 12929434686473. The next prime is 12929434686491. The reversal of 12929434686481 is 18468643492921.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11194484705856 + 1734949980625 = 3345816^2 + 1317175^2 .

It is a cyclic number.

It is not a de Polignac number, because 12929434686481 - 2³ = 12929434686473 is a prime.

It is a super-2 number, since 2×12929434686481² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (12929434686461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6464717343240 + 6464717343241.

It is an arithmetic number, because the mean of its divisors is an integer number (6464717343241).

Almost surely, 2^{12929434686481} is an apocalyptic number.

It is an amenable number.

12929434686481 is a deficient number, since it is larger than the sum of its proper divisors (1).

12929434686481 is an equidigital number, since it uses as much as digits as its factorization.

12929434686481 is an evil number, because the sum of its binary digits is even.

The product of its digits is 143327232, while the sum is 67.

The spelling of 12929434686481 in words is "twelve trillion, nine hundred twenty-nine billion, four hundred thirty-four million, six hundred eighty-six thousand, four hundred eighty-one".