1980163999 has 8 divisors (see below), whose sum is σ = 2161267920. Its totient is φ = 1799241600.

The previous prime is 1980163987. The next prime is 1980164009. The reversal of 1980163999 is 9993610891.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1980163999 - 2¹¹ = 1980161951 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1980163919) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22042 + ... + 66679.

It is an arithmetic number, because the mean of its divisors is an integer number (270158490).

Almost surely, 2^1980163999 is an apocalyptic number.

1980163999 is a deficient number, since it is larger than the sum of its proper divisors (181103921).

1980163999 is a wasteful number, since it uses less digits than its factorization.

1980163999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90761.

The product of its (nonzero) digits is 944784, while the sum is 55.

The square root of 1980163999 is about 44499.0336861375. The cubic root of 1980163999 is about 1255.7419038334.

The spelling of 1980163999 in words is "one billion, nine hundred eighty million, one hundred sixty-three thousand, nine hundred ninety-nine".