6861278259 has 36 divisors (see below), whose sum is σ = 11297133848. Its totient is φ = 4158332640.

The previous prime is 6861278257. The next prime is 6861278357. The reversal of 6861278259 is 9528721686.

6861278259 is a `hidden beast` number, since 68 + 61 + 278 + 259 = 666.

It is not a de Polignac number, because 6861278259 - 2¹ = 6861278257 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6861278257) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 87274 + ... + 146079.

Almost surely, 2^6861278259 is an apocalyptic number.

6861278259 is a deficient number, since it is larger than the sum of its proper divisors (4435855589).

6861278259 is a wasteful number, since it uses less digits than its factorization.

6861278259 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 233390 (or 233367 counting only the distinct ones).

The product of its digits is 2903040, while the sum is 54.

The square root of 6861278259 is about 82832.8332184768. The cubic root of 6861278259 is about 1900.2103422715.

The spelling of 6861278259 in words is "six billion, eight hundred sixty-one million, two hundred seventy-eight thousand, two hundred fifty-nine".