1983446905801 has 3 divisors (see below), whose sum is σ = 1983448314151. Its totient is φ = 1983445497452.

The previous prime is 1983446905753. The next prime is 1983446905883. The reversal of 1983446905801 is 1085096443891.

The square root of 1983446905801 is 1408349.

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 can be written as a sum of positive squares in only one way, i.e., 1529305695801 + 454141210000 = 1236651^2 + 673900^2 .

It is not a de Polignac number, because 1983446905801 - 2³¹ = 1981299422153 is a prime.

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1983446105801) 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, 704175 + ... + 2112523.

Almost surely, 2^{1983446905801} is an apocalyptic number.

1983446905801 is the 1408349-th square number.

1983446905801 is the 704175-th centered octagonal number.

It is an amenable number.

1983446905801 is a deficient number, since it is larger than the sum of its proper divisors (1408350).

1983446905801 is an frugal number, since it uses more digits than its factorization.

1983446905801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2816698 (or 1408349 counting only the distinct ones).

The product of its (nonzero) digits is 7464960, while the sum is 58.

The spelling of 1983446905801 in words is "one trillion, nine hundred eighty-three billion, four hundred forty-six million, nine hundred five thousand, eight hundred one".