256806650 has 24 divisors (see below), whose sum is σ = 478656864. Its totient is φ = 102508400.

The previous prime is 256806647. The next prime is 256806653. The reversal of 256806650 is 56608652.

It is a happy number.

256806650 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (256806647) and next prime (256806653).

It is not an unprimeable number, because it can be changed into a prime (256806653) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 20045 + ... + 30255.

It is an arithmetic number, because the mean of its divisors is an integer number (19944036).

Almost surely, 2^256806650 is an apocalyptic number.

256806650 is a deficient number, since it is larger than the sum of its proper divisors (221850214).

256806650 is a wasteful number, since it uses less digits than its factorization.

256806650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10726 (or 10721 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 38.

The square root of 256806650 is about 16025.1879864169. The cubic root of 256806650 is about 635.6266366676.

The spelling of 256806650 in words is "two hundred fifty-six million, eight hundred six thousand, six hundred fifty".