12731767726405 has 16 divisors (see below), whose sum is σ = 18803841565824. Its totient is φ = 8058789241920.

The previous prime is 12731767726393. The next prime is 12731767726429. The reversal of 12731767726405 is 50462776713721.

It is not a de Polignac number, because 12731767726405 - 2³⁷ = 12594328772933 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12731767726405.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13990953091 + ... + 13990954000.

It is an arithmetic number, because the mean of its divisors is an integer number (1175240097864).

Almost surely, 2^{12731767726405} is an apocalyptic number.

It is an amenable number.

12731767726405 is a deficient number, since it is larger than the sum of its proper divisors (6072073839419).

12731767726405 is a wasteful number, since it uses less digits than its factorization.

12731767726405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27981907116.

The product of its (nonzero) digits is 20744640, while the sum is 58.

The spelling of 12731767726405 in words is "twelve trillion, seven hundred thirty-one billion, seven hundred sixty-seven million, seven hundred twenty-six thousand, four hundred five".