1990839162841 has 3 divisors (see below), whose sum is σ = 1990840573813. Its totient is φ = 1990837751870.

The previous prime is 1990839162827. The next prime is 1990839162883. The reversal of 1990839162841 is 1482619380991.

The square root of 1990839162841 is 1410971.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 1990839162841 - 2³³ = 1982249228249 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1990839162841.

It is not an unprimeable number, because it can be changed into a prime (1990839162041) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 705486 + ... + 2116456.

Almost surely, 2^{1990839162841} is an apocalyptic number.

1990839162841 is the 1410971-st square number.

1990839162841 is the 705486-th centered octagonal number.

It is an amenable number.

1990839162841 is a deficient number, since it is larger than the sum of its proper divisors (1410972).

1990839162841 is an frugal number, since it uses more digits than its factorization.

1990839162841 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2821942 (or 1410971 counting only the distinct ones).

The product of its (nonzero) digits is 6718464, while the sum is 61.

The spelling of 1990839162841 in words is "one trillion, nine hundred ninety billion, eight hundred thirty-nine million, one hundred sixty-two thousand, eight hundred forty-one".