256199616 has 42 divisors (see below), whose sum is σ = 734351592. Its totient is φ = 85399680.

The previous prime is 256199579. The next prime is 256199641. The reversal of 256199616 is 616991652.

It is a happy number.

256199616 is a `hidden beast` number, since 25 + 6 + 1 + 9 + 9 + 616 = 666.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 221820 + ... + 222971.

Almost surely, 2^256199616 is an apocalyptic number.

It is an amenable number.

256199616 is an abundant number, since it is smaller than the sum of its proper divisors (478151976).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

256199616 is a wasteful number, since it uses less digits than its factorization.

256199616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 444809 (or 444796 counting only the distinct ones).

The product of its digits is 174960, while the sum is 45.

The square root of 256199616 is about 16006.2367844537. The cubic root of 256199616 is about 635.1254147061.

The spelling of 256199616 in words is "two hundred fifty-six million, one hundred ninety-nine thousand, six hundred sixteen".