256871347199 has 6 divisors (see below), whose sum is σ = 272870254944. Its totient is φ = 241761267680.

The previous prime is 256871347193. The next prime is 256871347241. The reversal of 256871347199 is 991743178652.

It is not a de Polignac number, because 256871347199 - 2¹² = 256871343103 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256871347193) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 444413807 + ... + 444414384.

It is an arithmetic number, because the mean of its divisors is an integer number (45478375824).

Almost surely, 2^256871347199 is an apocalyptic number.

256871347199 is a deficient number, since it is larger than the sum of its proper divisors (15998907745).

256871347199 is an equidigital number, since it uses as much as digits as its factorization.

256871347199 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 888828225 (or 888828208 counting only the distinct ones).

The product of its digits is 22861440, while the sum is 62.

The spelling of 256871347199 in words is "two hundred fifty-six billion, eight hundred seventy-one million, three hundred forty-seven thousand, one hundred ninety-nine".