12654818935921 has 2 divisors, whose sum is σ = 12654818935922. Its totient is φ = 12654818935920.

The previous prime is 12654818935903. The next prime is 12654818935973. The reversal of 12654818935921 is 12953981845621.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12118022399025 + 536796536896 = 3481095^2 + 732664^2 .

It is a cyclic number.

It is not a de Polignac number, because 12654818935921 - 2¹¹ = 12654818933873 is a prime.

It is not a weakly prime, because it can be changed into another prime (12654818935901) by changing a digit.

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 as a sum of consecutive naturals, namely, 6327409467960 + 6327409467961.

It is an arithmetic number, because the mean of its divisors is an integer number (6327409467961).

Almost surely, 2^{12654818935921} is an apocalyptic number.

It is an amenable number.

12654818935921 is a deficient number, since it is larger than the sum of its proper divisors (1).

12654818935921 is an equidigital number, since it uses as much as digits as its factorization.

12654818935921 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 37324800, while the sum is 64.

The spelling of 12654818935921 in words is "twelve trillion, six hundred fifty-four billion, eight hundred eighteen million, nine hundred thirty-five thousand, nine hundred twenty-one".