4640640849 has 16 divisors (see below), whose sum is σ = 7403872000. Its totient is φ = 2855778768.

The previous prime is 4640640827. The next prime is 4640640863. The reversal of 4640640849 is 9480460464.

It is not a de Polignac number, because 4640640849 - 2⁹ = 4640640337 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4640640049) 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, 6610249 + ... + 6610950.

It is an arithmetic number, because the mean of its divisors is an integer number (462742000).

Almost surely, 2^4640640849 is an apocalyptic number.

It is an amenable number.

4640640849 is a deficient number, since it is larger than the sum of its proper divisors (2763231151).

4640640849 is a wasteful number, since it uses less digits than its factorization.

4640640849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13221221 (or 13221215 counting only the distinct ones).

The product of its (nonzero) digits is 663552, while the sum is 45.

The square root of 4640640849 is about 68122.2492949257. The cubic root of 4640640849 is about 1667.9869667995.

The spelling of 4640640849 in words is "four billion, six hundred forty million, six hundred forty thousand, eight hundred forty-nine".