256484653 has 4 divisors (see below), whose sum is σ = 256977468. Its totient is φ = 255991840.

The previous prime is 256484651. The next prime is 256484663. The reversal of 256484653 is 356484652.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 62773929 + 193710724 = 7923^2 + 13918^2 .

It is a cyclic number.

It is not a de Polignac number, because 256484653 - 2¹ = 256484651 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256484651) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 245626 + ... + 246667.

It is an arithmetic number, because the mean of its divisors is an integer number (64244367).

Almost surely, 2^256484653 is an apocalyptic number.

It is an amenable number.

256484653 is a deficient number, since it is larger than the sum of its proper divisors (492815).

256484653 is an equidigital number, since it uses as much as digits as its factorization.

256484653 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 492814.

The product of its digits is 691200, while the sum is 43.

The square root of 256484653 is about 16015.1382447983. The cubic root of 256484653 is about 635.3608654197.

Subtracting 256484653 from its reverse (356484652), we obtain a palindrome (99999999).

The spelling of 256484653 in words is "two hundred fifty-six million, four hundred eighty-four thousand, six hundred fifty-three".