1648328863 has 4 divisors (see below), whose sum is σ = 1688532048. Its totient is φ = 1608125680.

The previous prime is 1648328819. The next prime is 1648328887. The reversal of 1648328863 is 3688238461.

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 1648328863 - 2¹⁷ = 1648197791 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 (1648323863) 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, 20101531 + ... + 20101612.

It is an arithmetic number, because the mean of its divisors is an integer number (422133012).

Almost surely, 2^1648328863 is an apocalyptic number.

1648328863 is a deficient number, since it is larger than the sum of its proper divisors (40203185).

1648328863 is an equidigital number, since it uses as much as digits as its factorization.

1648328863 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40203184.

The product of its digits is 1327104, while the sum is 49.

The square root of 1648328863 is about 40599.6165375980. The cubic root of 1648328863 is about 1181.2666812944.

The spelling of 1648328863 in words is "one billion, six hundred forty-eight million, three hundred twenty-eight thousand, eight hundred sixty-three".