1644450457103 has 8 divisors (see below), whose sum is σ = 1716155317728. Its totient is φ = 1572762847744.

The previous prime is 1644450457099. The next prime is 1644450457123. The reversal of 1644450457103 is 3017540544461.

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

It is a cyclic number.

It is not a de Polignac number, because 1644450457103 - 2² = 1644450457099 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1644450457123) 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, 4117826 + ... + 4499487.

It is an arithmetic number, because the mean of its divisors is an integer number (214519414716).

Almost surely, 2^{1644450457103} is an apocalyptic number.

1644450457103 is a deficient number, since it is larger than the sum of its proper divisors (71704860625).

1644450457103 is an equidigital number, since it uses as much as digits as its factorization.

1644450457103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8625633.

The product of its (nonzero) digits is 806400, while the sum is 44.

The spelling of 1644450457103 in words is "one trillion, six hundred forty-four billion, four hundred fifty million, four hundred fifty-seven thousand, one hundred three".