1256650468317 has 24 divisors (see below), whose sum is σ = 1825325443968. Its totient is φ = 833088866400.

The previous prime is 1256650468303. The next prime is 1256650468319. The reversal of 1256650468317 is 7138640566521.

It is a happy number.

1256650468317 is a `hidden beast` number, since 1 + 2 + 5 + 66 + 504 + 68 + 3 + 17 = 666.

It is not a de Polignac number, because 1256650468317 - 2⁷ = 1256650468189 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1256650468319) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 645168 + ... + 1711590.

It is an arithmetic number, because the mean of its divisors is an integer number (76055226832).

Almost surely, 2^{1256650468317} is an apocalyptic number.

It is an amenable number.

1256650468317 is a deficient number, since it is larger than the sum of its proper divisors (568674975651).

1256650468317 is a wasteful number, since it uses less digits than its factorization.

1256650468317 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1067161 (or 1067158 counting only the distinct ones).

The product of its (nonzero) digits is 7257600, while the sum is 54.

The spelling of 1256650468317 in words is "one trillion, two hundred fifty-six billion, six hundred fifty million, four hundred sixty-eight thousand, three hundred seventeen".