1256271386748 has 48 divisors (see below), whose sum is σ = 3495711690240. Its totient is φ = 343328825664.

The previous prime is 1256271386743. The next prime is 1256271386801. The reversal of 1256271386748 is 8476831726521.

It is a junction number, because it is equal to n+sod(n) for n = 1256271386691 and 1256271386700.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1256271386743) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 325120063 + ... + 325123926.

It is an arithmetic number, because the mean of its divisors is an integer number (72827326880).

Almost surely, 2^{1256271386748} is an apocalyptic number.

It is an amenable number.

1256271386748 is an abundant number, since it is smaller than the sum of its proper divisors (2239440303492).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1256271386748 is a wasteful number, since it uses less digits than its factorization.

1256271386748 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 650244026 (or 650244024 counting only the distinct ones).

The product of its digits is 27095040, while the sum is 60.

The spelling of 1256271386748 in words is "one trillion, two hundred fifty-six billion, two hundred seventy-one million, three hundred eighty-six thousand, seven hundred forty-eight".