279361988641 has 2 divisors, whose sum is σ = 279361988642. Its totient is φ = 279361988640.

The previous prime is 279361988579. The next prime is 279361988677. The reversal of 279361988641 is 146889163972.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 277856548641 + 1505440000 = 527121^2 + 38800^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-279361988641 is a prime.

It is not a weakly prime, because it can be changed into another prime (279361988341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 139680994320 + 139680994321.

It is an arithmetic number, because the mean of its divisors is an integer number (139680994321).

Almost surely, 2^279361988641 is an apocalyptic number.

It is an amenable number.

279361988641 is a deficient number, since it is larger than the sum of its proper divisors (1).

279361988641 is an equidigital number, since it uses as much as digits as its factorization.

279361988641 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 31352832, while the sum is 64.

The spelling of 279361988641 in words is "two hundred seventy-nine billion, three hundred sixty-one million, nine hundred eighty-eight thousand, six hundred forty-one".