1256260556356 has 24 divisors (see below), whose sum is σ = 2443941135104. Its totient is φ = 561108932640.

The previous prime is 1256260556351. The next prime is 1256260556357. The reversal of 1256260556356 is 6536550626521.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (52).

It is not an unprimeable number, because it can be changed into a prime (1256260556351) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 389657370 + ... + 389660593.

Almost surely, 2^{1256260556356} is an apocalyptic number.

It is an amenable number.

1256260556356 is a deficient number, since it is larger than the sum of its proper divisors (1187680578748).

1256260556356 is a wasteful number, since it uses less digits than its factorization.

1256260556356 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 779318011 (or 779318009 counting only the distinct ones).

The product of its (nonzero) digits is 9720000, while the sum is 52.

The spelling of 1256260556356 in words is "one trillion, two hundred fifty-six billion, two hundred sixty million, five hundred fifty-six thousand, three hundred fifty-six".