6878081281 has 2 divisors, whose sum is σ = 6878081282. Its totient is φ = 6878081280.

The previous prime is 6878081227. The next prime is 6878081303. The reversal of 6878081281 is 1821808786.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5515290225 + 1362791056 = 74265^2 + 36916^2 .

It is a cyclic number.

It is not a de Polignac number, because 6878081281 - 2¹³ = 6878073089 is a prime.

It is a super-2 number, since 2×6878081281² = 94616004216085201922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (6878081081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3439040640 + 3439040641.

It is an arithmetic number, because the mean of its divisors is an integer number (3439040641).

Almost surely, 2^6878081281 is an apocalyptic number.

It is an amenable number.

6878081281 is a deficient number, since it is larger than the sum of its proper divisors (1).

6878081281 is an equidigital number, since it uses as much as digits as its factorization.

6878081281 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 344064, while the sum is 49.

The square root of 6878081281 is about 82934.1985009803. The cubic root of 6878081281 is about 1901.7602598349.

The spelling of 6878081281 in words is "six billion, eight hundred seventy-eight million, eighty-one thousand, two hundred eighty-one".