1648380443 has 4 divisors (see below), whose sum is σ = 1648461840. Its totient is φ = 1648299048.

The previous prime is 1648380403. The next prime is 1648380457. The reversal of 1648380443 is 3440838461.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 1648380443 - 2¹² = 1648376347 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 1648380443.

It is not an unprimeable number, because it can be changed into a prime (1648380403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16121 + ... + 59637.

It is an arithmetic number, because the mean of its divisors is an integer number (412115460).

Almost surely, 2^1648380443 is an apocalyptic number.

1648380443 is a deficient number, since it is larger than the sum of its proper divisors (81397).

1648380443 is an equidigital number, since it uses as much as digits as its factorization.

1648380443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81396.

The product of its (nonzero) digits is 221184, while the sum is 41.

The square root of 1648380443 is about 40600.2517603032. The cubic root of 1648380443 is about 1181.2790026827.

The spelling of 1648380443 in words is "one billion, six hundred forty-eight million, three hundred eighty thousand, four hundred forty-three".