1802064505 has 4 divisors (see below), whose sum is σ = 2162477412. Its totient is φ = 1441651600.

The previous prime is 1802064499. The next prime is 1802064533. The reversal of 1802064505 is 5054602081.

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

It can be written as a sum of positive squares in 2 ways, for example, as 705858624 + 1096205881 = 26568^2 + 33109^2 .

It is not a de Polignac number, because 1802064505 - 2²⁷ = 1667846777 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

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 3 ways as a sum of consecutive naturals, for example, 180206446 + ... + 180206455.

It is an arithmetic number, because the mean of its divisors is an integer number (540619353).

Almost surely, 2^1802064505 is an apocalyptic number.

It is an amenable number.

1802064505 is a deficient number, since it is larger than the sum of its proper divisors (360412907).

1802064505 is an equidigital number, since it uses as much as digits as its factorization.

1802064505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 360412906.

The product of its (nonzero) digits is 9600, while the sum is 31.

The square root of 1802064505 is about 42450.7303235174. The cubic root of 1802064505 is about 1216.9052857387.

Adding to 1802064505 its reverse (5054602081), we get a palindrome (6856666586).

The spelling of 1802064505 in words is "one billion, eight hundred two million, sixty-four thousand, five hundred five".