256793545 has 4 divisors (see below), whose sum is σ = 308152260. Its totient is φ = 205434832.

The previous prime is 256793519. The next prime is 256793557. The reversal of 256793545 is 545397652.

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 97831881 + 158961664 = 9891^2 + 12608^2 .

It is a cyclic number.

It is not a de Polignac number, because 256793545 - 2¹¹ = 256791497 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 256793495 and 256793504.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25679350 + ... + 25679359.

It is an arithmetic number, because the mean of its divisors is an integer number (77038065).

Almost surely, 2^256793545 is an apocalyptic number.

It is an amenable number.

256793545 is a deficient number, since it is larger than the sum of its proper divisors (51358715).

256793545 is an equidigital number, since it uses as much as digits as its factorization.

256793545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51358714.

The product of its digits is 1134000, while the sum is 46.

The square root of 256793545 is about 16024.7790936412. The cubic root of 256793545 is about 635.6158243454.

The spelling of 256793545 in words is "two hundred fifty-six million, seven hundred ninety-three thousand, five hundred forty-five".