256160025 has 81 divisors (see below), whose sum is σ = 509565693. Its totient is φ = 122918400.

The previous prime is 256160017. The next prime is 256160111. The reversal of 256160025 is 520061652.

The square root of 256160025 is 16005.

It is a perfect power (a square), and thus also a powerful number.

256160025 is a `hidden beast` number, since 2 + 56 + 1 + 600 + 2 + 5 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 9418761 + 246741264 = 3069^2 + 15708^2 .

It is not a de Polignac number, because 256160025 - 2³ = 256160017 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 80 ways as a sum of consecutive naturals, for example, 2640777 + ... + 2640873.

Almost surely, 2^256160025 is an apocalyptic number.

256160025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

256160025 is the 16005-th square number.

256160025 is the 8003-rd centered octagonal number.

It is an amenable number.

256160025 is a deficient number, since it is larger than the sum of its proper divisors (253405668).

256160025 is a wasteful number, since it uses less digits than its factorization.

256160025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 232 (or 116 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

The cubic root of 256160025 is about 635.0926973195.

Multiplying 256160025 by its product of nonzero digits (3600), we get a square (922176090000 = 960300²).

The spelling of 256160025 in words is "two hundred fifty-six million, one hundred sixty thousand, twenty-five".