256545153 has 12 divisors (see below), whose sum is σ = 375256960. Its totient is φ = 168864696.

The previous prime is 256545109. The next prime is 256545167. The reversal of 256545153 is 351545652.

256545153 is a `hidden beast` number, since 2 + 565 + 45 + 1 + 53 = 666.

It is not a de Polignac number, because 256545153 - 2¹⁰ = 256544129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (256545193) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 179701 + ... + 181122.

Almost surely, 2^256545153 is an apocalyptic number.

It is an amenable number.

256545153 is a deficient number, since it is larger than the sum of its proper divisors (118711807).

256545153 is a wasteful number, since it uses less digits than its factorization.

256545153 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 360908 (or 360905 counting only the distinct ones).

The product of its digits is 90000, while the sum is 36.

The square root of 256545153 is about 16017.0269713202. The cubic root of 256545153 is about 635.4108181296.

The spelling of 256545153 in words is "two hundred fifty-six million, five hundred forty-five thousand, one hundred fifty-three".