256065655 has 8 divisors (see below), whose sum is σ = 309699072. Its totient is φ = 203239008.

The previous prime is 256065643. The next prime is 256065671. The reversal of 256065655 is 556560652.

256065655 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 a cyclic number.

It is not a de Polignac number, because 256065655 - 2⁹ = 256065143 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 200992 + ... + 202261.

It is an arithmetic number, because the mean of its divisors is an integer number (38712384).

Almost surely, 2^256065655 is an apocalyptic number.

256065655 is a deficient number, since it is larger than the sum of its proper divisors (53633417).

256065655 is a wasteful number, since it uses less digits than its factorization.

256065655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 403385.

The product of its (nonzero) digits is 270000, while the sum is 40.

The square root of 256065655 is about 16002.0515872184. The cubic root of 256065655 is about 635.0146978225.

The spelling of 256065655 in words is "two hundred fifty-six million, sixty-five thousand, six hundred fifty-five".