12712865738665 has 8 divisors (see below), whose sum is σ = 15627522761928. Its totient is φ = 9922236673920.

The previous prime is 12712865738659. The next prime is 12712865738669. The reversal of 12712865738665 is 56683756821721.

It can be written as a sum of positive squares in 4 ways, for example, as 311783757376 + 12401081981289 = 558376^2 + 3521517^2 .

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

It is not a de Polignac number, because 12712865738665 - 2¹⁷ = 12712865607593 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12712865738665.

It is not an unprimeable number, because it can be changed into a prime (12712865738669) 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, 31006989402 + ... + 31006989811.

It is an arithmetic number, because the mean of its divisors is an integer number (1953440345241).

Almost surely, 2^{12712865738665} is an apocalyptic number.

It is an amenable number.

12712865738665 is a deficient number, since it is larger than the sum of its proper divisors (2914657023263).

12712865738665 is an equidigital number, since it uses as much as digits as its factorization.

12712865738665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62013979259.

The product of its digits is 203212800, while the sum is 67.

The spelling of 12712865738665 in words is "twelve trillion, seven hundred twelve billion, eight hundred sixty-five million, seven hundred thirty-eight thousand, six hundred sixty-five".