1268644343685 has 16 divisors (see below), whose sum is σ = 2037917931840. Its totient is φ = 673914656000.

The previous prime is 1268644343669. The next prime is 1268644343717. The reversal of 1268644343685 is 5863434468621.

It is not a de Polignac number, because 1268644343685 - 2⁴ = 1268644343669 is a prime.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 168474900 + ... + 168482429.

It is an arithmetic number, because the mean of its divisors is an integer number (127369870740).

Almost surely, 2^{1268644343685} is an apocalyptic number.

1268644343685 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1268644343685 is a deficient number, since it is larger than the sum of its proper divisors (769273588155).

1268644343685 is a wasteful number, since it uses less digits than its factorization.

1268644343685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 336957588.

The product of its digits is 79626240, while the sum is 60.

The spelling of 1268644343685 in words is "one trillion, two hundred sixty-eight billion, six hundred forty-four million, three hundred forty-three thousand, six hundred eighty-five".