256670368889 has 48 divisors (see below), whose sum is σ = 300569547264. Its totient is φ = 216986169600.

The previous prime is 256670368879. The next prime is 256670368931. The reversal of 256670368889 is 988863076652.

It is not a de Polignac number, because 256670368889 - 2¹⁶ = 256670303353 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (256670368849) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 86917037 + ... + 86919989.

It is an arithmetic number, because the mean of its divisors is an integer number (6261865568).

Almost surely, 2^256670368889 is an apocalyptic number.

It is an amenable number.

256670368889 is a deficient number, since it is larger than the sum of its proper divisors (43899178375).

256670368889 is a wasteful number, since it uses less digits than its factorization.

256670368889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3198 (or 3115 counting only the distinct ones).

The product of its (nonzero) digits is 209018880, while the sum is 68.

The spelling of 256670368889 in words is "two hundred fifty-six billion, six hundred seventy million, three hundred sixty-eight thousand, eight hundred eighty-nine".