4640644000 has 48 divisors (see below), whose sum is σ = 11402072136. Its totient is φ = 1856256000.

The previous prime is 4640643989. The next prime is 4640644031. The reversal of 4640644000 is 4460464.

It can be written as a sum of positive squares in 4 ways, for example, as 2002383504 + 2638260496 = 44748^2 + 51364^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 4640644000.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 576081 + ... + 584080.

Almost surely, 2^4640644000 is an apocalyptic number.

4640644000 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

4640644000 is an abundant number, since it is smaller than the sum of its proper divisors (6761428136).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

4640644000 is a wasteful number, since it uses less digits than its factorization.

4640644000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1160186 (or 1160168 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 28.

The square root of 4640644000 is about 68122.2724224611. The cubic root of 4640644000 is about 1667.9873443210.

The spelling of 4640644000 in words is "four billion, six hundred forty million, six hundred forty-four thousand".