256163198 has 8 divisors (see below), whose sum is σ = 384633192. Its totient is φ = 127952136.

The previous prime is 256163197. The next prime is 256163251. The reversal of 256163198 is 891361652.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256163197) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 62240 + ... + 66227.

It is an arithmetic number, because the mean of its divisors is an integer number (48079149).

Almost surely, 2^256163198 is an apocalyptic number.

256163198 is a deficient number, since it is larger than the sum of its proper divisors (128469994).

256163198 is a wasteful number, since it uses less digits than its factorization.

256163198 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129466.

The product of its digits is 77760, while the sum is 41.

The square root of 256163198 is about 16005.0991249664. The cubic root of 256163198 is about 635.0953195616.

The spelling of 256163198 in words is "two hundred fifty-six million, one hundred sixty-three thousand, one hundred ninety-eight".