4778430644 has 48 divisors (see below), whose sum is σ = 9344778240. Its totient is φ = 2123089920.

The previous prime is 4778430623. The next prime is 4778430647. The reversal of 4778430644 is 4460348774.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4778430647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 303437 + ... + 318795.

It is an arithmetic number, because the mean of its divisors is an integer number (194682880).

Almost surely, 2^4778430644 is an apocalyptic number.

It is an amenable number.

4778430644 is a deficient number, since it is larger than the sum of its proper divisors (4566347596).

4778430644 is a wasteful number, since it uses less digits than its factorization.

4778430644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15600 (or 15598 counting only the distinct ones).

The product of its (nonzero) digits is 1806336, while the sum is 47.

The square root of 4778430644 is about 69126.1936171810. The cubic root of 4778430644 is about 1684.3348281886.

The spelling of 4778430644 in words is "four billion, seven hundred seventy-eight million, four hundred thirty thousand, six hundred forty-four".