1256781113468 has 6 divisors (see below), whose sum is σ = 2199366948576. Its totient is φ = 628390556732.

The previous prime is 1256781113459. The next prime is 1256781113473. The reversal of 1256781113468 is 8643111876521.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 157097639180 + ... + 157097639187.

It is an arithmetic number, because the mean of its divisors is an integer number (366561158096).

Almost surely, 2^{1256781113468} is an apocalyptic number.

It is an amenable number.

1256781113468 is a deficient number, since it is larger than the sum of its proper divisors (942585835108).

1256781113468 is a wasteful number, since it uses less digits than its factorization.

1256781113468 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 314195278371 (or 314195278369 counting only the distinct ones).

The product of its digits is 1935360, while the sum is 53.

Adding to 1256781113468 its reverse (8643111876521), we get a palindrome (9899892989989).

The spelling of 1256781113468 in words is "one trillion, two hundred fifty-six billion, seven hundred eighty-one million, one hundred thirteen thousand, four hundred sixty-eight".