6416840649 has 32 divisors (see below), whose sum is σ = 8956569600. Its totient is φ = 4083543360.

The previous prime is 6416840623. The next prime is 6416840653. The reversal of 6416840649 is 9460486146.

It is a happy number.

It is not a de Polignac number, because 6416840649 - 2¹⁷ = 6416709577 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 6416840598 and 6416840607.

It is not an unprimeable number, because it can be changed into a prime (6416840149) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 849202 + ... + 856724.

It is an arithmetic number, because the mean of its divisors is an integer number (279892800).

Almost surely, 2^6416840649 is an apocalyptic number.

It is an amenable number.

6416840649 is a deficient number, since it is larger than the sum of its proper divisors (2539728951).

6416840649 is a wasteful number, since it uses less digits than its factorization.

6416840649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7725.

The product of its (nonzero) digits is 995328, while the sum is 48.

The square root of 6416840649 is about 80105.1849070957. The cubic root of 6416840649 is about 1858.2625939964.

The spelling of 6416840649 in words is "six billion, four hundred sixteen million, eight hundred forty thousand, six hundred forty-nine".