12731220405663 has 8 divisors (see below), whose sum is σ = 17868379516800. Its totient is φ = 8040770782488.

The previous prime is 12731220405649. The next prime is 12731220405679. The reversal of 12731220405663 is 36650402213721.

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

It is not a de Polignac number, because 12731220405663 - 2⁴ = 12731220405647 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12731220403663) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 111677371923 + ... + 111677372036.

It is an arithmetic number, because the mean of its divisors is an integer number (2233547439600).

Almost surely, 2^{12731220405663} is an apocalyptic number.

12731220405663 is a deficient number, since it is larger than the sum of its proper divisors (5137159111137).

12731220405663 is a wasteful number, since it uses less digits than its factorization.

12731220405663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 223354743981.

The product of its (nonzero) digits is 362880, while the sum is 42.

The spelling of 12731220405663 in words is "twelve trillion, seven hundred thirty-one billion, two hundred twenty million, four hundred five thousand, six hundred sixty-three".