1644455125343 has 4 divisors (see below), whose sum is σ = 1644564675768. Its totient is φ = 1644345574920.

The previous prime is 1644455125333. The next prime is 1644455125387. The reversal of 1644455125343 is 3435215544461.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1644455125343 - 2¹⁸ = 1644454863199 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 (1644455125333) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 54752693 + ... + 54782718.

It is an arithmetic number, because the mean of its divisors is an integer number (411141168942).

Almost surely, 2^{1644455125343} is an apocalyptic number.

1644455125343 is a deficient number, since it is larger than the sum of its proper divisors (109550425).

1644455125343 is a wasteful number, since it uses less digits than its factorization.

1644455125343 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109550424.

The product of its digits is 3456000, while the sum is 47.

The spelling of 1644455125343 in words is "one trillion, six hundred forty-four billion, four hundred fifty-five million, one hundred twenty-five thousand, three hundred forty-three".