1648665338 has 16 divisors (see below), whose sum is σ = 2619838080. Its totient is φ = 775436736.

The previous prime is 1648665307. The next prime is 1648665349. The reversal of 1648665338 is 8335668461.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 59183 + ... + 82461.

It is an arithmetic number, because the mean of its divisors is an integer number (163739880).

Almost surely, 2^1648665338 is an apocalyptic number.

1648665338 is a deficient number, since it is larger than the sum of its proper divisors (971172742).

1648665338 is a wasteful number, since it uses less digits than its factorization.

1648665338 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25381.

The product of its digits is 2488320, while the sum is 50.

The square root of 1648665338 is about 40603.7601460751. The cubic root of 1648665338 is about 1181.3470535376.

The spelling of 1648665338 in words is "one billion, six hundred forty-eight million, six hundred sixty-five thousand, three hundred thirty-eight".