279875678491 has 16 divisors (see below), whose sum is σ = 284879282688. Its totient is φ = 274917988800.

The previous prime is 279875678471. The next prime is 279875678531. The reversal of 279875678491 is 194876578972.

It is a cyclic number.

It is not a de Polignac number, because 279875678491 - 2⁷ = 279875678363 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (279875678471) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 47586871 + ... + 47592751.

It is an arithmetic number, because the mean of its divisors is an integer number (17804955168).

Almost surely, 2^279875678491 is an apocalyptic number.

279875678491 is a deficient number, since it is larger than the sum of its proper divisors (5003604197).

279875678491 is a wasteful number, since it uses less digits than its factorization.

279875678491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9642.

The product of its digits is 426746880, while the sum is 73.

The spelling of 279875678491 in words is "two hundred seventy-nine billion, eight hundred seventy-five million, six hundred seventy-eight thousand, four hundred ninety-one".