1256881388132 has 24 divisors (see below), whose sum is σ = 2275983309600. Its totient is φ = 606928867776.

The previous prime is 1256881388111. The next prime is 1256881388141. The reversal of 1256881388132 is 2318831886521.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 41037782 + ... + 41068397.

It is an arithmetic number, because the mean of its divisors is an integer number (94832637900).

Almost surely, 2^{1256881388132} is an apocalyptic number.

It is an amenable number.

1256881388132 is a deficient number, since it is larger than the sum of its proper divisors (1019101921468).

1256881388132 is a wasteful number, since it uses less digits than its factorization.

1256881388132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82106315 (or 82106313 counting only the distinct ones).

The product of its digits is 4423680, while the sum is 56.

The spelling of 1256881388132 in words is "one trillion, two hundred fifty-six billion, eight hundred eighty-one million, three hundred eighty-eight thousand, one hundred thirty-two".