12978665853735 has 8 divisors (see below), whose sum is σ = 20765865366000. Its totient is φ = 6921955121984.

The previous prime is 12978665853701. The next prime is 12978665853763. The reversal of 12978665853735 is 53735856687921.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12978665853735 - 2¹⁴ = 12978665837351 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 432622195110 + ... + 432622195139.

It is an arithmetic number, because the mean of its divisors is an integer number (2595733170750).

Almost surely, 2^{12978665853735} is an apocalyptic number.

12978665853735 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

12978665853735 is a deficient number, since it is larger than the sum of its proper divisors (7787199512265).

12978665853735 is an equidigital number, since it uses as much as digits as its factorization.

12978665853735 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 865244390257.

The product of its digits is 2286144000, while the sum is 75.

The spelling of 12978665853735 in words is "twelve trillion, nine hundred seventy-eight billion, six hundred sixty-five million, eight hundred fifty-three thousand, seven hundred thirty-five".