256416169 has 9 divisors (see below), whose sum is σ = 261394077. Its totient is φ = 251532204.

The previous prime is 256416143. The next prime is 256416197. The reversal of 256416169 is 961614652.

It is a happy number.

The square root of 256416169 is 16013.

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

256416169 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 256416169 - 2⁹ = 256415657 is a prime.

It is a super-2 number, since 2×256416169² = 131498503449273122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (256416119) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 1072752 + ... + 1072990.

Almost surely, 2^256416169 is an apocalyptic number.

256416169 is the 16013-rd square number.

256416169 is the 8007-th centered octagonal number.

It is an amenable number.

256416169 is a deficient number, since it is larger than the sum of its proper divisors (4977908).

256416169 is an frugal number, since it uses more digits than its factorization.

256416169 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 612 (or 306 counting only the distinct ones).

The product of its digits is 77760, while the sum is 40.

The cubic root of 256416169 is about 635.3043111239.

The spelling of 256416169 in words is "two hundred fifty-six million, four hundred sixteen thousand, one hundred sixty-nine".