12731748499971 has 6 divisors (see below), whose sum is σ = 18390303388860. Its totient is φ = 8487832333308.

The previous prime is 12731748499969. The next prime is 12731748499973. The reversal of 12731748499971 is 17999484713721.

12731748499971 is a `hidden beast` number, since 1 + 2 + 7 + 3 + 1 + 7 + 48 + 499 + 97 + 1 = 666.

It is an interprime number because it is at equal distance from previous prime (12731748499969) and next prime (12731748499973).

It is not a de Polignac number, because 12731748499971 - 2¹ = 12731748499969 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12731748499971.

It is not an unprimeable number, because it can be changed into a prime (12731748499973) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 707319361101 + ... + 707319361118.

It is an arithmetic number, because the mean of its divisors is an integer number (3065050564810).

Almost surely, 2^{12731748499971} is an apocalyptic number.

12731748499971 is a deficient number, since it is larger than the sum of its proper divisors (5658554888889).

12731748499971 is a wasteful number, since it uses less digits than its factorization.

12731748499971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1414638722225 (or 1414638722222 counting only the distinct ones).

The product of its digits is 192036096, while the sum is 72.

The spelling of 12731748499971 in words is "twelve trillion, seven hundred thirty-one billion, seven hundred forty-eight million, four hundred ninety-nine thousand, nine hundred seventy-one".