1648311643 has 8 divisors (see below), whose sum is σ = 1842016176. Its totient is φ = 1461916800.

The previous prime is 1648311559. The next prime is 1648311661. The reversal of 1648311643 is 3461138461.

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 1648311643 - 2¹⁷ = 1648180571 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1648311043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1826946 + ... + 1827847.

It is an arithmetic number, because the mean of its divisors is an integer number (230252022).

Almost surely, 2^1648311643 is an apocalyptic number.

1648311643 is a deficient number, since it is larger than the sum of its proper divisors (193704533).

1648311643 is a wasteful number, since it uses less digits than its factorization.

1648311643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3654845.

The product of its digits is 41472, while the sum is 37.

The square root of 1648311643 is about 40599.4044660756. The cubic root of 1648311643 is about 1181.2625677377.

The spelling of 1648311643 in words is "one billion, six hundred forty-eight million, three hundred eleven thousand, six hundred forty-three".