1648490865 has 16 divisors (see below), whose sum is σ = 3014383488. Its totient is φ = 753595776.

The previous prime is 1648490843. The next prime is 1648490869. The reversal of 1648490865 is 5680948461.

It is not a de Polignac number, because 1648490865 - 2¹⁰ = 1648489841 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1648490869) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7849852 + ... + 7850061.

It is an arithmetic number, because the mean of its divisors is an integer number (188398968).

Almost surely, 2^1648490865 is an apocalyptic number.

1648490865 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1648490865 is a deficient number, since it is larger than the sum of its proper divisors (1365892623).

1648490865 is a wasteful number, since it uses less digits than its factorization.

1648490865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15699928.

The product of its (nonzero) digits is 1658880, while the sum is 51.

The square root of 1648490865 is about 40601.6116059449. The cubic root of 1648490865 is about 1181.3053793359.

The spelling of 1648490865 in words is "one billion, six hundred forty-eight million, four hundred ninety thousand, eight hundred sixty-five".