256142655 has 48 divisors (see below), whose sum is σ = 487547424. Its totient is φ = 128563200.

The previous prime is 256142647. The next prime is 256142669. The reversal of 256142655 is 556241652.

256142655 is a `hidden beast` number, since 2 + 561 + 42 + 6 + 55 = 666.

It is not a de Polignac number, because 256142655 - 2³ = 256142647 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 14455 + ... + 26855.

It is an arithmetic number, because the mean of its divisors is an integer number (10157238).

Almost surely, 2^256142655 is an apocalyptic number.

256142655 is a deficient number, since it is larger than the sum of its proper divisors (231404769).

256142655 is a wasteful number, since it uses less digits than its factorization.

256142655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12438 (or 12426 counting only the distinct ones).

The product of its digits is 72000, while the sum is 36.

The square root of 256142655 is about 16004.4573478766. The cubic root of 256142655 is about 635.0783419577.

The spelling of 256142655 in words is "two hundred fifty-six million, one hundred forty-two thousand, six hundred fifty-five".