4643378844 has 192 divisors, whose sum is σ = 12680478720. Its totient is φ = 1309777920.

The previous prime is 4643378837. The next prime is 4643378903. The reversal of 4643378844 is 4488733464.

Together with 8037099875 it forms a betrothed pair.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 24310789 + ... + 24310979.

It is an arithmetic number, because the mean of its divisors is an integer number (66044160).

Almost surely, 2^4643378844 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 4643378844, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6340239360).

4643378844 is an abundant number, since it is smaller than the sum of its proper divisors (8037099876).

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

4643378844 is a wasteful number, since it uses less digits than its factorization.

4643378844 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 420 (or 418 counting only the distinct ones).

The product of its digits is 6193152, while the sum is 51.

The square root of 4643378844 is about 68142.3425191709. The cubic root of 4643378844 is about 1668.3149417673.

The spelling of 4643378844 in words is "four billion, six hundred forty-three million, three hundred seventy-eight thousand, eight hundred forty-four".