256673168 has 10 divisors (see below), whose sum is σ = 497304294. Its totient is φ = 128336576.

The previous prime is 256673167. The next prime is 256673173. The reversal of 256673168 is 861376652.

It can be written as a sum of positive squares in only one way, i.e., 216325264 + 40347904 = 14708^2 + 6352^2 .

It is a super-2 number, since 2×256673168² = 131762230342312448, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (256673167) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8021021 + ... + 8021052.

Almost surely, 2^256673168 is an apocalyptic number.

It is an amenable number.

256673168 is a deficient number, since it is larger than the sum of its proper divisors (240631126).

256673168 is a wasteful number, since it uses less digits than its factorization.

256673168 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16042081 (or 16042075 counting only the distinct ones).

The product of its digits is 362880, while the sum is 44.

The square root of 256673168 is about 16021.0226889547. The cubic root of 256673168 is about 635.5164897029.

The spelling of 256673168 in words is "two hundred fifty-six million, six hundred seventy-three thousand, one hundred sixty-eight".