13680021252808 has 16 divisors (see below), whose sum is σ = 25691883316380. Its totient is φ = 6828852368448.

The previous prime is 13680021252713. The next prime is 13680021252871. The reversal of 13680021252808 is 80825212008631.

It can be written as a sum of positive squares in 2 ways, for example, as 13673887543684 + 6133709124 = 3697822^2 + 78318^2 .

It is a super-4 number, since 4×13680021252808⁴ (a number of 54 digits) contains 4444 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1394777035 + ... + 1394786842.

Almost surely, 2^{13680021252808} is an apocalyptic number.

It is an amenable number.

13680021252808 is a deficient number, since it is larger than the sum of its proper divisors (12011862063572).

13680021252808 is a wasteful number, since it uses less digits than its factorization.

13680021252808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2789564496 (or 2789564492 counting only the distinct ones).

The product of its (nonzero) digits is 368640, while the sum is 46.

The spelling of 13680021252808 in words is "thirteen trillion, six hundred eighty billion, twenty-one million, two hundred fifty-two thousand, eight hundred eight".