1990301849453 has 4 divisors (see below), whose sum is σ = 2058932947740. Its totient is φ = 1921670751168.

The previous prime is 1990301849387. The next prime is 1990301849479. The reversal of 1990301849453 is 3549481030991.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 678445447684 + 1311856401769 = 823678^2 + 1145363^2 .

It is a cyclic number.

It is not a de Polignac number, because 1990301849453 - 2⁴⁰ = 890790221677 is a prime.

It is a super-2 number, since 2×1990301849453² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1990301842453) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34315549100 + ... + 34315549157.

It is an arithmetic number, because the mean of its divisors is an integer number (514733236935).

Almost surely, 2^{1990301849453} is an apocalyptic number.

It is an amenable number.

1990301849453 is a deficient number, since it is larger than the sum of its proper divisors (68631098287).

1990301849453 is an equidigital number, since it uses as much as digits as its factorization.

1990301849453 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68631098286.

The product of its (nonzero) digits is 4199040, while the sum is 56.

The spelling of 1990301849453 in words is "one trillion, nine hundred ninety billion, three hundred one million, eight hundred forty-nine thousand, four hundred fifty-three".