8561278279 has 8 divisors (see below), whose sum is σ = 8771030208. Its totient is φ = 8352676320.

The previous prime is 8561278261. The next prime is 8561278283. The reversal of 8561278279 is 9728721658.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 8561278279 - 2⁷ = 8561278151 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8561278379) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 272412 + ... + 302209.

It is an arithmetic number, because the mean of its divisors is an integer number (1096378776).

Almost surely, 2^8561278279 is an apocalyptic number.

8561278279 is a deficient number, since it is larger than the sum of its proper divisors (209751929).

8561278279 is a wasteful number, since it uses less digits than its factorization.

8561278279 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 574985.

The product of its digits is 3386880, while the sum is 55.

The square root of 8561278279 is about 92527.1758944365. The cubic root of 8561278279 is about 2045.7200636598.

The spelling of 8561278279 in words is "eight billion, five hundred sixty-one million, two hundred seventy-eight thousand, two hundred seventy-nine".