256443344652 has 48 divisors (see below), whose sum is σ = 652861706112. Its totient is φ = 77698577280.

The previous prime is 256443344621. The next prime is 256443344671.

256443344652 is nontrivially palindromic in base 10.

It is a super-2 number, since 2×256443344652² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 771088 + ... + 1052360.

It is an arithmetic number, because the mean of its divisors is an integer number (13601285544).

Almost surely, 2^256443344652 is an apocalyptic number.

256443344652 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

256443344652 is an abundant number, since it is smaller than the sum of its proper divisors (396418361460).

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

256443344652 is a wasteful number, since it uses less digits than its factorization.

256443344652 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 288198 (or 288196 counting only the distinct ones).

The product of its digits is 8294400, while the sum is 48.

The spelling of 256443344652 in words is "two hundred fifty-six billion, four hundred forty-three million, three hundred forty-four thousand, six hundred fifty-two".