256613450427 has 6 divisors (see below), whose sum is σ = 370663872852. Its totient is φ = 171075633612.

The previous prime is 256613450417. The next prime is 256613450449. The reversal of 256613450427 is 724054316652.

256613450427 is a `hidden beast` number, since 2 + 5 + 6 + 6 + 134 + 504 + 2 + 7 = 666.

It is not a de Polignac number, because 256613450427 - 2¹⁵ = 256613417659 is a prime.

It is not an unprimeable number, because it can be changed into a prime (256613450407) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 14256302793 + ... + 14256302810.

It is an arithmetic number, because the mean of its divisors is an integer number (61777312142).

Almost surely, 2^256613450427 is an apocalyptic number.

256613450427 is a deficient number, since it is larger than the sum of its proper divisors (114050422425).

256613450427 is a wasteful number, since it uses less digits than its factorization.

256613450427 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28512605609 (or 28512605606 counting only the distinct ones).

The product of its (nonzero) digits is 1209600, while the sum is 45.

The spelling of 256613450427 in words is "two hundred fifty-six billion, six hundred thirteen million, four hundred fifty thousand, four hundred twenty-seven".