1256666114447 has 8 divisors (see below), whose sum is σ = 1322931830400. Its totient is φ = 1190412937944.

The previous prime is 1256666114401. The next prime is 1256666114449. The reversal of 1256666114447 is 7444116666521.

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

It is a cyclic number.

It is not a de Polignac number, because 1256666114447 - 2¹⁸ = 1256665852303 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 (1256666114449) 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 7 ways as a sum of consecutive naturals, for example, 2928797 + ... + 3330342.

It is an arithmetic number, because the mean of its divisors is an integer number (165366478800).

Almost surely, 2^{1256666114447} is an apocalyptic number.

1256666114447 is a deficient number, since it is larger than the sum of its proper divisors (66265715953).

1256666114447 is a wasteful number, since it uses less digits than its factorization.

1256666114447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6269725.

The product of its digits is 5806080, while the sum is 53.

The spelling of 1256666114447 in words is "one trillion, two hundred fifty-six billion, six hundred sixty-six million, one hundred fourteen thousand, four hundred forty-seven".