1998016975 has 6 divisors (see below), whose sum is σ = 2477541080. Its totient is φ = 1598413560.

The previous prime is 1998016957. The next prime is 1998017017. The reversal of 1998016975 is 5796108991.

It is not a de Polignac number, because 1998016975 - 2¹⁹ = 1997492687 is a prime.

It is a congruent number.

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 39960315 + ... + 39960364.

Almost surely, 2^1998016975 is an apocalyptic number.

1998016975 is a deficient number, since it is larger than the sum of its proper divisors (479524105).

1998016975 is an equidigital number, since it uses as much as digits as its factorization.

1998016975 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79920689 (or 79920684 counting only the distinct ones).

The product of its (nonzero) digits is 1224720, while the sum is 55.

The square root of 1998016975 is about 44699.1831580847. The cubic root of 1998016975 is about 1259.5045030374.

It can be divided in two parts, 1998016 and 975, that added together give a palindrome (1998991).

The spelling of 1998016975 in words is "one billion, nine hundred ninety-eight million, sixteen thousand, nine hundred seventy-five".