1998546111 has 24 divisors (see below), whose sum is σ = 2939353040. Its totient is φ = 1308182400.

The previous prime is 1998546091. The next prime is 1998546119. The reversal of 1998546111 is 1116458991.

1998546111 is a `hidden beast` number, since 1 + 9 + 98 + 546 + 1 + 11 = 666.

It is not a de Polignac number, because 1998546111 - 2⁹ = 1998545599 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 (1998546119) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 336891 + ... + 342771.

Almost surely, 2^1998546111 is an apocalyptic number.

1998546111 is a deficient number, since it is larger than the sum of its proper divisors (940806929).

1998546111 is a wasteful number, since it uses less digits than its factorization.

1998546111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6567 (or 6564 counting only the distinct ones).

The product of its digits is 77760, while the sum is 45.

The square root of 1998546111 is about 44705.1016216270. The cubic root of 1998546111 is about 1259.6156783276.

The spelling of 1998546111 in words is "one billion, nine hundred ninety-eight million, five hundred forty-six thousand, one hundred eleven".