12759420673521 has 24 divisors (see below), whose sum is σ = 18884189253384. Its totient is φ = 8296877859840.

The previous prime is 12759420673511. The next prime is 12759420673579. The reversal of 12759420673521 is 12537602495721.

12759420673521 is a `hidden beast` number, since 1 + 2 + 7 + 5 + 9 + 42 + 0 + 6 + 73 + 521 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 296480250000 + 12462940423521 = 544500^2 + 3530289^2 .

It is not a de Polignac number, because 12759420673521 - 2²⁷ = 12759286455793 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12759420673511) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2437956 + ... + 5609141.

It is an arithmetic number, because the mean of its divisors is an integer number (786841218891).

Almost surely, 2^{12759420673521} is an apocalyptic number.

It is an amenable number.

12759420673521 is a deficient number, since it is larger than the sum of its proper divisors (6124768579863).

12759420673521 is a wasteful number, since it uses less digits than its factorization.

12759420673521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8051441 (or 8051438 counting only the distinct ones).

The product of its (nonzero) digits is 6350400, while the sum is 54.

The spelling of 12759420673521 in words is "twelve trillion, seven hundred fifty-nine billion, four hundred twenty million, six hundred seventy-three thousand, five hundred twenty-one".