279921468286081 has 12 divisors (see below), whose sum is σ = 289261458174612. Its totient is φ = 270685126398816.

The previous prime is 279921468286073. The next prime is 279921468286129. The reversal of 279921468286081 is 180682864129972.

It can be written as a sum of positive squares in 2 ways, for example, as 188669014947856 + 91252453338225 = 13735684^2 + 9552615^2 .

It is not a de Polignac number, because 279921468286081 - 2³ = 279921468286073 is a prime.

It is a super-2 number, since 2×279921468286081² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 279921468285995 and 279921468286013.

It is not an unprimeable number, because it can be changed into a prime (279921468286181) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 141390486 + ... + 143356591.

It is an arithmetic number, because the mean of its divisors is an integer number (24105121514551).

Almost surely, 2^{279921468286081} is an apocalyptic number.

It is an amenable number.

279921468286081 is a deficient number, since it is larger than the sum of its proper divisors (9339989888531).

279921468286081 is an equidigital number, since it uses as much as digits as its factorization.

279921468286081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 284747440 (or 284747277 counting only the distinct ones).

The product of its (nonzero) digits is 334430208, while the sum is 73.

The spelling of 279921468286081 in words is "two hundred seventy-nine trillion, nine hundred twenty-one billion, four hundred sixty-eight million, two hundred eighty-six thousand, eighty-one".