256006635 has 16 divisors (see below), whose sum is σ = 423735840. Its totient is φ = 131828480.

The previous prime is 256006609. The next prime is 256006637. The reversal of 256006635 is 536600652.

It is not a de Polignac number, because 256006635 - 2²⁷ = 121788907 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 256006596 and 256006605.

It is not an unprimeable number, because it can be changed into a prime (256006637) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 293826 + ... + 294695.

It is an arithmetic number, because the mean of its divisors is an integer number (26483490).

Almost surely, 2^256006635 is an apocalyptic number.

256006635 is a deficient number, since it is larger than the sum of its proper divisors (167729205).

256006635 is a wasteful number, since it uses less digits than its factorization.

256006635 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 588558.

The product of its (nonzero) digits is 32400, while the sum is 33.

The square root of 256006635 is about 16000.2073424065. The cubic root of 256006635 is about 634.9659063680.

The spelling of 256006635 in words is "two hundred fifty-six million, six thousand, six hundred thirty-five".