256506332425767 has 18 divisors (see below), whose sum is σ = 393585841107888. Its totient is φ = 160945149755712.

The previous prime is 256506332425751. The next prime is 256506332425799. The reversal of 256506332425767 is 767524233605652.

256506332425767 is a `hidden beast` number, since 2 + 5 + 6 + 5 + 0 + 6 + 33 + 24 + 2 + 576 + 7 = 666.

256506332425767 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 256506332425767 - 2⁴ = 256506332425751 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256506332426767) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 49309173183 + ... + 49309178384.

Almost surely, 2^{256506332425767} is an apocalyptic number.

256506332425767 is a deficient number, since it is larger than the sum of its proper divisors (137079508682121).

256506332425767 is a wasteful number, since it uses less digits than its factorization.

256506332425767 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98618351607 (or 98618351587 counting only the distinct ones).

The product of its (nonzero) digits is 381024000, while the sum is 63.

The spelling of 256506332425767 in words is "two hundred fifty-six trillion, five hundred six billion, three hundred thirty-two million, four hundred twenty-five thousand, seven hundred sixty-seven".