256446013036 has 12 divisors (see below), whose sum is σ = 453223895040. Its totient is φ = 126953471600.

The previous prime is 256446013009. The next prime is 256446013073. The reversal of 256446013036 is 630310644652.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 256446013036.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 317383276 + ... + 317384083.

It is an arithmetic number, because the mean of its divisors is an integer number (37768657920).

Almost surely, 2^256446013036 is an apocalyptic number.

It is an amenable number.

256446013036 is a deficient number, since it is larger than the sum of its proper divisors (196777882004).

256446013036 is a wasteful number, since it uses less digits than its factorization.

256446013036 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 634767464 (or 634767462 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 40.

Adding to 256446013036 its reverse (630310644652), we get a palindrome (886756657688).

The spelling of 256446013036 in words is "two hundred fifty-six billion, four hundred forty-six million, thirteen thousand, thirty-six".