12771376539538 has 8 divisors (see below), whose sum is σ = 19157177382588. Its totient is φ = 6385650745344.

The previous prime is 12771376539503. The next prime is 12771376539613. The reversal of 12771376539538 is 83593567317721.

It can be written as a sum of positive squares in 2 ways, for example, as 10391771035129 + 2379605504409 = 3223627^2 + 1542597^2 .

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

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 3 ways as a sum of consecutive naturals, for example, 18334831 + ... + 19018642.

Almost surely, 2^{12771376539538} is an apocalyptic number.

12771376539538 is a deficient number, since it is larger than the sum of its proper divisors (6385800843050).

12771376539538 is a wasteful number, since it uses less digits than its factorization.

12771376539538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37524428.

The product of its digits is 200037600, while the sum is 67.

The spelling of 12771376539538 in words is "twelve trillion, seven hundred seventy-one billion, three hundred seventy-six million, five hundred thirty-nine thousand, five hundred thirty-eight".