2491335820279 has 2 divisors, whose sum is σ = 2491335820280. Its totient is φ = 2491335820278.

The previous prime is 2491335820247. The next prime is 2491335820331. The reversal of 2491335820279 is 9720285331942.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2491335820279 - 2⁵ = 2491335820247 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2491335824279) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1245667910139 + 1245667910140.

It is an arithmetic number, because the mean of its divisors is an integer number (1245667910140).

Almost surely, 2^{2491335820279} is an apocalyptic number.

2491335820279 is a deficient number, since it is larger than the sum of its proper divisors (1).

2491335820279 is an equidigital number, since it uses as much as digits as its factorization.

2491335820279 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6531840, while the sum is 55.

The spelling of 2491335820279 in words is "two trillion, four hundred ninety-one billion, three hundred thirty-five million, eight hundred twenty thousand, two hundred seventy-nine".