1800664145 has 16 divisors (see below), whose sum is σ = 2470195200. Its totient is φ = 1234384704.

The previous prime is 1800664133. The next prime is 1800664169. The reversal of 1800664145 is 5414660081.

It is not a de Polignac number, because 1800664145 - 2⁶ = 1800664081 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 187931 + ... + 197279.

It is an arithmetic number, because the mean of its divisors is an integer number (154387200).

Almost surely, 2^1800664145 is an apocalyptic number.

It is an amenable number.

1800664145 is a deficient number, since it is larger than the sum of its proper divisors (669531055).

1800664145 is an equidigital number, since it uses as much as digits as its factorization.

1800664145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14864.

The product of its (nonzero) digits is 23040, while the sum is 35.

The square root of 1800664145 is about 42434.2331732294. The cubic root of 1800664145 is about 1216.5899904974.

The spelling of 1800664145 in words is "one billion, eight hundred million, six hundred sixty-four thousand, one hundred forty-five".