1918826985799 has 2 divisors, whose sum is σ = 1918826985800. Its totient is φ = 1918826985798.

The previous prime is 1918826985787. The next prime is 1918826985821. The reversal of 1918826985799 is 9975896288191.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1918826985799 - 2⁵ = 1918826985767 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1918826985709) 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, 959413492899 + 959413492900.

It is an arithmetic number, because the mean of its divisors is an integer number (959413492900).

Almost surely, 2^{1918826985799} is an apocalyptic number.

1918826985799 is a deficient number, since it is larger than the sum of its proper divisors (1).

1918826985799 is an equidigital number, since it uses as much as digits as its factorization.

1918826985799 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1410877440, while the sum is 82.

The spelling of 1918826985799 in words is "one trillion, nine hundred eighteen billion, eight hundred twenty-six million, nine hundred eighty-five thousand, seven hundred ninety-nine".