256057672443 has 16 divisors (see below), whose sum is σ = 345042798240. Its totient is φ = 168889982976.

The previous prime is 256057672399. The next prime is 256057672447. The reversal of 256057672443 is 344276750652.

It is not a de Polignac number, because 256057672443 - 2¹⁸ = 256057410299 is a prime.

It is not an unprimeable number, because it can be changed into a prime (256057672447) 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, 756471 + ... + 1041327.

It is an arithmetic number, because the mean of its divisors is an integer number (21565174890).

Almost surely, 2^256057672443 is an apocalyptic number.

256057672443 is a deficient number, since it is larger than the sum of its proper divisors (88985125797).

256057672443 is a wasteful number, since it uses less digits than its factorization.

256057672443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 288046.

The product of its (nonzero) digits is 8467200, while the sum is 51.

The spelling of 256057672443 in words is "two hundred fifty-six billion, fifty-seven million, six hundred seventy-two thousand, four hundred forty-three".