1048649865 has 16 divisors (see below), whose sum is σ = 1731964416. Its totient is φ = 541238400.

The previous prime is 1048649857. The next prime is 1048649909. The reversal of 1048649865 is 5689468401.

It is not a de Polignac number, because 1048649865 - 2³ = 1048649857 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1127116 + ... + 1128045.

It is an arithmetic number, because the mean of its divisors is an integer number (108247776).

Almost surely, 2^1048649865 is an apocalyptic number.

1048649865 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1048649865 is a deficient number, since it is larger than the sum of its proper divisors (683314551).

1048649865 is a wasteful number, since it uses less digits than its factorization.

1048649865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2255200.

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

The square root of 1048649865 is about 32382.8637553877. The cubic root of 1048649865 is about 1015.9605279605.

The spelling of 1048649865 in words is "one billion, forty-eight million, six hundred forty-nine thousand, eight hundred sixty-five".