279648479685 has 32 divisors (see below), whose sum is σ = 448988012928. Its totient is φ = 148629841920.

The previous prime is 279648479681. The next prime is 279648479701. The reversal of 279648479685 is 586974846972.

It is not a de Polignac number, because 279648479685 - 2² = 279648479681 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (279648479681) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5710705 + ... + 5759465.

It is an arithmetic number, because the mean of its divisors is an integer number (14030875404).

Almost surely, 2^279648479685 is an apocalyptic number.

It is an amenable number.

279648479685 is a deficient number, since it is larger than the sum of its proper divisors (169339533243).

279648479685 is a wasteful number, since it uses less digits than its factorization.

279648479685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50085.

The product of its digits is 1463132160, while the sum is 75.

The spelling of 279648479685 in words is "two hundred seventy-nine billion, six hundred forty-eight million, four hundred seventy-nine thousand, six hundred eighty-five".