1819850109859 has 2 divisors, whose sum is σ = 1819850109860. Its totient is φ = 1819850109858.

The previous prime is 1819850109853. The next prime is 1819850109893. The reversal of 1819850109859 is 9589010589181.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1819850109859 - 2⁷ = 1819850109731 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1819850109859.

It is not a weakly prime, because it can be changed into another prime (1819850109853) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 909925054929 + 909925054930.

It is an arithmetic number, because the mean of its divisors is an integer number (909925054930).

Almost surely, 2^{1819850109859} is an apocalyptic number.

1819850109859 is a deficient number, since it is larger than the sum of its proper divisors (1).

1819850109859 is an equidigital number, since it uses as much as digits as its factorization.

1819850109859 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9331200, while the sum is 64.

The spelling of 1819850109859 in words is "one trillion, eight hundred nineteen billion, eight hundred fifty million, one hundred nine thousand, eight hundred fifty-nine".