4644969813 has 32 divisors (see below), whose sum is σ = 7511316480. Its totient is φ = 2813523120.

The previous prime is 4644969809. The next prime is 4644969821. The reversal of 4644969813 is 3189694464.

It is a happy number.

4644969813 is a `hidden beast` number, since 4 + 64 + 496 + 98 + 1 + 3 = 666.

It is not a de Polignac number, because 4644969813 - 2² = 4644969809 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 4644969813.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4644969613) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 704470 + ... + 711032.

It is an arithmetic number, because the mean of its divisors is an integer number (234728640).

Almost surely, 2^4644969813 is an apocalyptic number.

It is an amenable number.

4644969813 is a deficient number, since it is larger than the sum of its proper divisors (2866346667).

4644969813 is a wasteful number, since it uses less digits than its factorization.

4644969813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8966 (or 8960 counting only the distinct ones).

The product of its digits is 4478976, while the sum is 54.

The square root of 4644969813 is about 68154.0153842750. The cubic root of 4644969813 is about 1668.5054592302.

The spelling of 4644969813 in words is "four billion, six hundred forty-four million, nine hundred sixty-nine thousand, eight hundred thirteen".