1145565198 has 12 divisors (see below), whose sum is σ = 2482057968. Its totient is φ = 381855060.

The previous prime is 1145565149. The next prime is 1145565217. The reversal of 1145565198 is 8915655411.

1145565198 is a `hidden beast` number, since 1 + 1 + 4 + 556 + 5 + 1 + 98 = 666.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 31821238 + ... + 31821273.

It is an arithmetic number, because the mean of its divisors is an integer number (206838164).

Almost surely, 2^1145565198 is an apocalyptic number.

1145565198 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1145565198 is an abundant number, since it is smaller than the sum of its proper divisors (1336492770).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1145565198 is a wasteful number, since it uses less digits than its factorization.

1145565198 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63642519 (or 63642516 counting only the distinct ones).

The product of its digits is 216000, while the sum is 45.

The square root of 1145565198 is about 33846.1991662284. The cubic root of 1145565198 is about 1046.3410658862.

The spelling of 1145565198 in words is "one billion, one hundred forty-five million, five hundred sixty-five thousand, one hundred ninety-eight".