1645013002 has 8 divisors (see below), whose sum is σ = 2467841796. Its totient is φ = 822399072.

The previous prime is 1645012997. The next prime is 1645013033. The reversal of 1645013002 is 2003105461.

It can be written as a sum of positive squares in 2 ways, for example, as 1512509881 + 132503121 = 38891^2 + 11511^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 32973 + ... + 66160.

Almost surely, 2^1645013002 is an apocalyptic number.

1645013002 is a deficient number, since it is larger than the sum of its proper divisors (822828794).

1645013002 is an equidigital number, since it uses as much as digits as its factorization.

1645013002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107432.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 1645013002 is about 40558.7598676291. The cubic root of 1645013002 is about 1180.4740511273.

Adding to 1645013002 its reverse (2003105461), we get a palindrome (3648118463).

The spelling of 1645013002 in words is "one billion, six hundred forty-five million, thirteen thousand, two".