256464145 has 16 divisors (see below), whose sum is σ = 367015680. Its totient is φ = 168214464.

The previous prime is 256464133. The next prime is 256464151. The reversal of 256464145 is 541464652.

It is a cyclic number.

It is not a de Polignac number, because 256464145 - 2⁵ = 256464113 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 158490 + ... + 160099.

It is an arithmetic number, because the mean of its divisors is an integer number (22938480).

Almost surely, 2^256464145 is an apocalyptic number.

It is an amenable number.

256464145 is a deficient number, since it is larger than the sum of its proper divisors (110551535).

256464145 is a wasteful number, since it uses less digits than its factorization.

256464145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 318624.

The product of its digits is 115200, while the sum is 37.

The square root of 256464145 is about 16014.4979627836. The cubic root of 256464145 is about 635.3439309069.

It can be divided in two parts, 25646 and 4145, that added together give a cube (29791 = 31³).

The spelling of 256464145 in words is "two hundred fifty-six million, four hundred sixty-four thousand, one hundred forty-five".