256243215754 has 8 divisors (see below), whose sum is σ = 384506611488. Its totient is φ = 128074345260.

The previous prime is 256243215751. The next prime is 256243215769. The reversal of 256243215754 is 457512342652.

256243215754 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (256243215751) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23624532 + ... + 23635375.

It is an arithmetic number, because the mean of its divisors is an integer number (48063326436).

Almost surely, 2^256243215754 is an apocalyptic number.

256243215754 is a deficient number, since it is larger than the sum of its proper divisors (128263395734).

256243215754 is a wasteful number, since it uses less digits than its factorization.

256243215754 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47262620.

The product of its digits is 2016000, while the sum is 46.

The spelling of 256243215754 in words is "two hundred fifty-six billion, two hundred forty-three million, two hundred fifteen thousand, seven hundred fifty-four".