256304522320 has 80 divisors (see below), whose sum is σ = 742950269568. Its totient is φ = 79887121920.

The previous prime is 256304522303. The next prime is 256304522329. The reversal of 256304522320 is 23225403652.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256304522329) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20797779 + ... + 20810098.

Almost surely, 2^256304522320 is an apocalyptic number.

256304522320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

256304522320 is an abundant number, since it is smaller than the sum of its proper divisors (486645747248).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

256304522320 is a wasteful number, since it uses less digits than its factorization.

256304522320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41607908 (or 41607902 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 34.

Adding to 256304522320 its reverse (23225403652), we get a palindrome (279529925972).

The spelling of 256304522320 in words is "two hundred fifty-six billion, three hundred four million, five hundred twenty-two thousand, three hundred twenty".