256621061370304 has 56 divisors (see below), whose sum is σ = 511156436064560. Its totient is φ = 127826354589696.

The previous prime is 256621061370299. The next prime is 256621061370307. The reversal of 256621061370304 is 403073160126652.

It is a happy number.

256621061370304 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256621061370307) 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, 21870307 + ... + 31488925.

Almost surely, 2^{256621061370304} is an apocalyptic number.

It is an amenable number.

256621061370304 is a deficient number, since it is larger than the sum of its proper divisors (254535374694256).

256621061370304 is a wasteful number, since it uses less digits than its factorization.

256621061370304 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9620205 (or 9620195 counting only the distinct ones).

The product of its (nonzero) digits is 1088640, while the sum is 46.

The spelling of 256621061370304 in words is "two hundred fifty-six trillion, six hundred twenty-one billion, sixty-one million, three hundred seventy thousand, three hundred four".