1990682656219 has 2 divisors, whose sum is σ = 1990682656220. Its totient is φ = 1990682656218.

The previous prime is 1990682656213. The next prime is 1990682656229. The reversal of 1990682656219 is 9126562860991.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1990682656219 - 2²¹ = 1990680559067 is a prime.

It is a super-2 number, since 2×1990682656219² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1990682656213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 995341328109 + 995341328110.

It is an arithmetic number, because the mean of its divisors is an integer number (995341328110).

Almost surely, 2^{1990682656219} is an apocalyptic number.

1990682656219 is a deficient number, since it is larger than the sum of its proper divisors (1).

1990682656219 is an equidigital number, since it uses as much as digits as its factorization.

1990682656219 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 25194240, while the sum is 64.

The spelling of 1990682656219 in words is "one trillion, nine hundred ninety billion, six hundred eighty-two million, six hundred fifty-six thousand, two hundred nineteen".