256404010456 has 32 divisors (see below), whose sum is σ = 524956320000. Its totient is φ = 116437595040.

The previous prime is 256404010453. The next prime is 256404010459. The reversal of 256404010456 is 654010404652.

It is an interprime number because it is at equal distance from previous prime (256404010453) and next prime (256404010459).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256404010453) 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, 1276956 + ... + 1464043.

It is an arithmetic number, because the mean of its divisors is an integer number (16404885000).

Almost surely, 2^256404010456 is an apocalyptic number.

It is an amenable number.

256404010456 is an abundant number, since it is smaller than the sum of its proper divisors (268552309544).

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

256404010456 is a wasteful number, since it uses less digits than its factorization.

256404010456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2742079 (or 2742075 counting only the distinct ones).

The product of its (nonzero) digits is 115200, while the sum is 37.

The spelling of 256404010456 in words is "two hundred fifty-six billion, four hundred four million, ten thousand, four hundred fifty-six".