1198105511 has 4 divisors (see below), whose sum is σ = 1199268624. Its totient is φ = 1196942400.

The previous prime is 1198105459. The next prime is 1198105537. The reversal of 1198105511 is 1155018911.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1198105511 is a prime.

It is a super-2 number, since 2×1198105511² = 2870913630977142242, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1198105541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 580010 + ... + 582071.

It is an arithmetic number, because the mean of its divisors is an integer number (299817156).

Almost surely, 2^1198105511 is an apocalyptic number.

1198105511 is a deficient number, since it is larger than the sum of its proper divisors (1163113).

1198105511 is a wasteful number, since it uses less digits than its factorization.

1198105511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1163112.

The product of its (nonzero) digits is 1800, while the sum is 32.

The square root of 1198105511 is about 34613.6607569902. The cubic root of 1198105511 is about 1062.0990538110.

The spelling of 1198105511 in words is "one billion, one hundred ninety-eight million, one hundred five thousand, five hundred eleven".