1145644185 has 48 divisors (see below), whose sum is σ = 2116872576. Its totient is φ = 518284032.

The previous prime is 1145644169. The next prime is 1145644187. The reversal of 1145644185 is 5814465411.

It is not a de Polignac number, because 1145644185 - 2⁴ = 1145644169 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1145644187) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1201669 + ... + 1202621.

It is an arithmetic number, because the mean of its divisors is an integer number (44101512).

Almost surely, 2^1145644185 is an apocalyptic number.

1145644185 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1145644185 is a deficient number, since it is larger than the sum of its proper divisors (971228391).

1145644185 is an equidigital number, since it uses as much as digits as its factorization.

1145644185 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1182 (or 1075 counting only the distinct ones).

The product of its digits is 76800, while the sum is 39.

The square root of 1145644185 is about 33847.3659979621. The cubic root of 1145644185 is about 1046.3651138242.

The spelling of 1145644185 in words is "one billion, one hundred forty-five million, six hundred forty-four thousand, one hundred eighty-five".