256349601 has 12 divisors (see below), whose sum is σ = 370431360. Its totient is φ = 170831160.

The previous prime is 256349591. The next prime is 256349641. The reversal of 256349601 is 106943652.

It is a happy number.

256349601 is a `hidden beast` number, since 2 + 5 + 6 + 3 + 49 + 601 = 666.

It is not a de Polignac number, because 256349601 - 2⁶ = 256349537 is a prime.

It is not an unprimeable number, because it can be changed into a prime (256349641) 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, 29160 + ... + 36918.

It is an arithmetic number, because the mean of its divisors is an integer number (30869280).

Almost surely, 2^256349601 is an apocalyptic number.

It is an amenable number.

256349601 is a deficient number, since it is larger than the sum of its proper divisors (114081759).

256349601 is a wasteful number, since it uses less digits than its factorization.

256349601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11436 (or 11433 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 36.

The square root of 256349601 is about 16010.9213039100. The cubic root of 256349601 is about 635.2493294148.

The spelling of 256349601 in words is "two hundred fifty-six million, three hundred forty-nine thousand, six hundred one".