1645324366873 has 8 divisors (see below), whose sum is σ = 1795541065920. Its totient is φ = 1495214627280.

The previous prime is 1645324366853. The next prime is 1645324366883. The reversal of 1645324366873 is 3786634235461.

It is a happy number.

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

It is not a de Polignac number, because 1645324366873 - 2⁵ = 1645324366841 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1645324366853) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26707693 + ... + 26769226.

It is an arithmetic number, because the mean of its divisors is an integer number (224442633240).

Almost surely, 2^{1645324366873} is an apocalyptic number.

It is an amenable number.

1645324366873 is a deficient number, since it is larger than the sum of its proper divisors (150216699047).

1645324366873 is a wasteful number, since it uses less digits than its factorization.

1645324366873 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53479727.

The product of its digits is 52254720, while the sum is 58.

The spelling of 1645324366873 in words is "one trillion, six hundred forty-five billion, three hundred twenty-four million, three hundred sixty-six thousand, eight hundred seventy-three".