12731213663 has 40 divisors (see below), whose sum is σ = 15747222000. Its totient is φ = 10263262464.

The previous prime is 12731213639. The next prime is 12731213669. The reversal of 12731213663 is 36631213721.

It is not a de Polignac number, because 12731213663 - 2³² = 8436246367 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12731213669) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 6796295 + ... + 6798167.

It is an arithmetic number, because the mean of its divisors is an integer number (393680550).

Almost surely, 2^12731213663 is an apocalyptic number.

12731213663 is a deficient number, since it is larger than the sum of its proper divisors (3016008337).

12731213663 is an equidigital number, since it uses as much as digits as its factorization.

12731213663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2069 (or 2048 counting only the distinct ones).

The product of its digits is 27216, while the sum is 35.

The spelling of 12731213663 in words is "twelve billion, seven hundred thirty-one million, two hundred thirteen thousand, six hundred sixty-three".