12731832205555 has 4 divisors (see below), whose sum is σ = 15278198646672. Its totient is φ = 10185465764440.

The previous prime is 12731832205541. The next prime is 12731832205591. The reversal of 12731832205555 is 55550223813721.

It is a semiprime because it is the product of two primes.

It is a de Polignac number, because none of the positive numbers 2^k-12731832205555 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12731832205499 and 12731832205508.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1273183220551 + ... + 1273183220560.

It is an arithmetic number, because the mean of its divisors is an integer number (3819549661668).

Almost surely, 2^{12731832205555} is an apocalyptic number.

12731832205555 is a deficient number, since it is larger than the sum of its proper divisors (2546366441117).

12731832205555 is an equidigital number, since it uses as much as digits as its factorization.

12731832205555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2546366441116.

The product of its (nonzero) digits is 2520000, while the sum is 49.

The spelling of 12731832205555 in words is "twelve trillion, seven hundred thirty-one billion, eight hundred thirty-two million, two hundred five thousand, five hundred fifty-five".