1645322611003 has 8 divisors (see below), whose sum is σ = 1646424186368. Its totient is φ = 1644221173824.

The previous prime is 1645322610979. The next prime is 1645322611007. The reversal of 1645322611003 is 3001162235461.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1645322611003 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1645322611003.

It is not an unprimeable number, because it can be changed into a prime (1645322611007) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35859625 + ... + 35905477.

It is an arithmetic number, because the mean of its divisors is an integer number (205803023296).

Almost surely, 2^{1645322611003} is an apocalyptic number.

1645322611003 is a deficient number, since it is larger than the sum of its proper divisors (1101575365).

1645322611003 is a wasteful number, since it uses less digits than its factorization.

1645322611003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69093.

The product of its (nonzero) digits is 25920, while the sum is 34.

Adding to 1645322611003 its reverse (3001162235461), we get a palindrome (4646484846464).

The spelling of 1645322611003 in words is "one trillion, six hundred forty-five billion, three hundred twenty-two million, six hundred eleven thousand, three".