1645514004445 has 4 divisors (see below), whose sum is σ = 1974616805340. Its totient is φ = 1316411203552.

The previous prime is 1645514004443. The next prime is 1645514004557. The reversal of 1645514004445 is 5444004155461.

It is a happy number.

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 692418701689 + 953095302756 = 832117^2 + 976266^2 .

It is a cyclic number.

It is not a de Polignac number, because 1645514004445 - 2¹ = 1645514004443 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1645514004443) 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 3 ways as a sum of consecutive naturals, for example, 164551400440 + ... + 164551400449.

It is an arithmetic number, because the mean of its divisors is an integer number (493654201335).

Almost surely, 2^{1645514004445} is an apocalyptic number.

It is an amenable number.

1645514004445 is a deficient number, since it is larger than the sum of its proper divisors (329102800895).

1645514004445 is an equidigital number, since it uses as much as digits as its factorization.

1645514004445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 329102800894.

The product of its (nonzero) digits is 768000, while the sum is 43.

The spelling of 1645514004445 in words is "one trillion, six hundred forty-five billion, five hundred fourteen million, four thousand, four hundred forty-five".