256507724534503 has 4 divisors (see below), whose sum is σ = 276239087960248. Its totient is φ = 236776361108760.

The previous prime is 256507724534491. The next prime is 256507724534513. The reversal of 256507724534503 is 305435427705652.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-256507724534503 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256507724534513) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9865681712853 + ... + 9865681712878.

It is an arithmetic number, because the mean of its divisors is an integer number (69059771990062).

Almost surely, 2^{256507724534503} is an apocalyptic number.

256507724534503 is a deficient number, since it is larger than the sum of its proper divisors (19731363425745).

256507724534503 is a wasteful number, since it uses less digits than its factorization.

256507724534503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19731363425744.

The product of its (nonzero) digits is 105840000, while the sum is 58.

The spelling of 256507724534503 in words is "two hundred fifty-six trillion, five hundred seven billion, seven hundred twenty-four million, five hundred thirty-four thousand, five hundred three".