256393461276 has 18 divisors (see below), whose sum is σ = 648105693872. Its totient is φ = 85464487080.

The previous prime is 256393461271. The next prime is 256393461277. The reversal of 256393461276 is 672164393652.

256393461276 is a `hidden beast` number, since 2 + 563 + 9 + 3 + 4 + 6 + 1 + 2 + 76 = 666.

It is a tau number, because it is divible by the number of its divisors (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256393461271) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 3561020260 + ... + 3561020331.

Almost surely, 2^256393461276 is an apocalyptic number.

It is an amenable number.

256393461276 is an abundant number, since it is smaller than the sum of its proper divisors (391712232596).

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

256393461276 is a wasteful number, since it uses less digits than its factorization.

256393461276 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7122040601 (or 7122040596 counting only the distinct ones).

The product of its digits is 9797760, while the sum is 54.

The spelling of 256393461276 in words is "two hundred fifty-six billion, three hundred ninety-three million, four hundred sixty-one thousand, two hundred seventy-six".