256170863 has 8 divisors (see below), whose sum is σ = 290396400. Its totient is φ = 224019648.

The previous prime is 256170857. The next prime is 256170877. The reversal of 256170863 is 368071652.

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

It is a cyclic number.

It is not a de Polignac number, because 256170863 - 2⁴ = 256170847 is a prime.

It is a super-2 number, since 2×256170863² = 131247022100329538, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256170853) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 518318 + ... + 518811.

It is an arithmetic number, because the mean of its divisors is an integer number (36299550).

Almost surely, 2^256170863 is an apocalyptic number.

256170863 is a deficient number, since it is larger than the sum of its proper divisors (34225537).

256170863 is a wasteful number, since it uses less digits than its factorization.

256170863 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1037161.

The product of its (nonzero) digits is 60480, while the sum is 38.

The square root of 256170863 is about 16005.3385781120. The cubic root of 256170863 is about 635.1016540092.

The spelling of 256170863 in words is "two hundred fifty-six million, one hundred seventy thousand, eight hundred sixty-three".