1648836665 has 8 divisors (see below), whose sum is σ = 2261261760. Its totient is φ = 1130630832.

The previous prime is 1648836643. The next prime is 1648836671. The reversal of 1648836665 is 5666388461.

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 1648836665 - 2⁶ = 1648836601 is a prime.

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, 23554775 + ... + 23554844.

It is an arithmetic number, because the mean of its divisors is an integer number (282657720).

Almost surely, 2^1648836665 is an apocalyptic number.

It is an amenable number.

1648836665 is a deficient number, since it is larger than the sum of its proper divisors (612425095).

1648836665 is an equidigital number, since it uses as much as digits as its factorization.

1648836665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47109631.

The product of its digits is 4976640, while the sum is 53.

The square root of 1648836665 is about 40605.8698342986. The cubic root of 1648836665 is about 1181.3879734323.

The spelling of 1648836665 in words is "one billion, six hundred forty-eight million, eight hundred thirty-six thousand, six hundred sixty-five".