12726435808 has 24 divisors (see below), whose sum is σ = 26144527248. Its totient is φ = 6086555904.

The previous prime is 12726435803. The next prime is 12726435811. The reversal of 12726435808 is 80853462721.

It is a super-2 number, since 2×12726435808² (a number of 21 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (46) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (46).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12726435803) 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, 8644941 + ... + 8646412.

It is an arithmetic number, because the mean of its divisors is an integer number (1089355302).

Almost surely, 2^12726435808 is an apocalyptic number.

It is an amenable number.

12726435808 is an abundant number, since it is smaller than the sum of its proper divisors (13418091440).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12726435808 is a wasteful number, since it uses less digits than its factorization.

12726435808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17291386 (or 17291378 counting only the distinct ones).

The product of its (nonzero) digits is 645120, while the sum is 46.

The spelling of 12726435808 in words is "twelve billion, seven hundred twenty-six million, four hundred thirty-five thousand, eight hundred eight".