256196146 has 4 divisors (see below), whose sum is σ = 384294222. Its totient is φ = 128098072.

The previous prime is 256196071. The next prime is 256196147. The reversal of 256196146 is 641691652.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 158482921 + 97713225 = 12589^2 + 9885^2 .

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 256196099 and 256196108.

It is not an unprimeable number, because it can be changed into a prime (256196147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64049035 + ... + 64049038.

Almost surely, 2^256196146 is an apocalyptic number.

256196146 is a deficient number, since it is larger than the sum of its proper divisors (128098076).

256196146 is a wasteful number, since it uses less digits than its factorization.

256196146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128098075.

The product of its digits is 77760, while the sum is 40.

The square root of 256196146 is about 16006.1283888391. The cubic root of 256196146 is about 635.1225472868.

The spelling of 256196146 in words is "two hundred fifty-six million, one hundred ninety-six thousand, one hundred forty-six".