12631223665 has 8 divisors (see below), whose sum is σ = 15168950568. Its totient is φ = 10097324160.

The previous prime is 12631223663. The next prime is 12631223723. The reversal of 12631223665 is 56632213621.

12631223665 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 1208744289 + 11422479376 = 34767^2 + 106876^2 .

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

It is not a de Polignac number, because 12631223665 - 2¹ = 12631223663 is a prime.

It is a super-2 number, since 2×12631223665² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12631223663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 949582 + ... + 962791.

It is an arithmetic number, because the mean of its divisors is an integer number (1896118821).

Almost surely, 2^12631223665 is an apocalyptic number.

It is an amenable number.

12631223665 is a deficient number, since it is larger than the sum of its proper divisors (2537726903).

12631223665 is a wasteful number, since it uses less digits than its factorization.

12631223665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1913699.

The product of its digits is 77760, while the sum is 37.

The spelling of 12631223665 in words is "twelve billion, six hundred thirty-one million, two hundred twenty-three thousand, six hundred sixty-five".