1782667478279 has 2 divisors, whose sum is σ = 1782667478280. Its totient is φ = 1782667478278.

The previous prime is 1782667478233. The next prime is 1782667478309. The reversal of 1782667478279 is 9728747662871.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1782667478279 - 2⁸ = 1782667478023 is a prime.

It is a super-2 number, since 2×1782667478279² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1782667468279) 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 as a sum of consecutive naturals, namely, 891333739139 + 891333739140.

It is an arithmetic number, because the mean of its divisors is an integer number (891333739140).

Almost surely, 2^{1782667478279} is an apocalyptic number.

1782667478279 is a deficient number, since it is larger than the sum of its proper divisors (1).

1782667478279 is an equidigital number, since it uses as much as digits as its factorization.

1782667478279 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 796594176, while the sum is 74.

The spelling of 1782667478279 in words is "one trillion, seven hundred eighty-two billion, six hundred sixty-seven million, four hundred seventy-eight thousand, two hundred seventy-nine".