1990899616619 has 2 divisors, whose sum is σ = 1990899616620. Its totient is φ = 1990899616618.

The previous prime is 1990899616609. The next prime is 1990899616621. The reversal of 1990899616619 is 9166169980991.

It is a strong prime.

It is an emirp because it is prime and its reverse (9166169980991) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1990899616619 - 2⁴ = 1990899616603 is a prime.

It is a super-2 number, since 2×1990899616619² (a number of 25 digits) contains 22 as substring.

Together with 1990899616621, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1990899616609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 995449808309 + 995449808310.

It is an arithmetic number, because the mean of its divisors is an integer number (995449808310).

Almost surely, 2^{1990899616619} is an apocalyptic number.

1990899616619 is a deficient number, since it is larger than the sum of its proper divisors (1).

1990899616619 is an equidigital number, since it uses as much as digits as its factorization.

1990899616619 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 102036672, while the sum is 74.

The spelling of 1990899616619 in words is "one trillion, nine hundred ninety billion, eight hundred ninety-nine million, six hundred sixteen thousand, six hundred nineteen".