12685182481 has 4 divisors (see below), whose sum is σ = 12769190464. Its totient is φ = 12601174500.

The previous prime is 12685182463. The next prime is 12685182493. The reversal of 12685182481 is 18428158621.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 12685182481 - 2⁷ = 12685182353 is a prime.

It is a super-2 number, since 2×12685182481² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12685182421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42003765 + ... + 42004066.

It is an arithmetic number, because the mean of its divisors is an integer number (3192297616).

Almost surely, 2^12685182481 is an apocalyptic number.

It is an amenable number.

12685182481 is a deficient number, since it is larger than the sum of its proper divisors (84007983).

12685182481 is an equidigital number, since it uses as much as digits as its factorization.

12685182481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84007982.

The product of its digits is 245760, while the sum is 46.

The spelling of 12685182481 in words is "twelve billion, six hundred eighty-five million, one hundred eighty-two thousand, four hundred eighty-one".