8464020644 has 24 divisors (see below), whose sum is σ = 15348039168. Its totient is φ = 4079905920.

The previous prime is 8464020601. The next prime is 8464020647. The reversal of 8464020644 is 4460204648.

It is a junction number, because it is equal to n+sod(n) for n = 8464020598 and 8464020607.

It is not an unprimeable number, because it can be changed into a prime (8464020647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 97157 + ... + 162380.

It is an arithmetic number, because the mean of its divisors is an integer number (639501632).

Almost surely, 2^8464020644 is an apocalyptic number.

It is an amenable number.

8464020644 is a deficient number, since it is larger than the sum of its proper divisors (6884018524).

8464020644 is a wasteful number, since it uses less digits than its factorization.

8464020644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 259835 (or 259833 counting only the distinct ones).

The product of its (nonzero) digits is 147456, while the sum is 38.

The square root of 8464020644 is about 92000.1121955838. The cubic root of 8464020644 is about 2037.9439623921.

The spelling of 8464020644 in words is "eight billion, four hundred sixty-four million, twenty thousand, six hundred forty-four".