4644918636 has 24 divisors (see below), whose sum is σ = 11475681840. Its totient is φ = 1457229312.

The previous prime is 4644918613. The next prime is 4644918643. The reversal of 4644918636 is 6368194464.

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

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, 11384401 + ... + 11384808.

It is an arithmetic number, because the mean of its divisors is an integer number (478153410).

Almost surely, 2^4644918636 is an apocalyptic number.

It is an amenable number.

4644918636 is an abundant number, since it is smaller than the sum of its proper divisors (6830763204).

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

4644918636 is a wasteful number, since it uses less digits than its factorization.

4644918636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22769233 (or 22769231 counting only the distinct ones).

The product of its digits is 2985984, while the sum is 51.

The square root of 4644918636 is about 68153.6399321416. The cubic root of 4644918636 is about 1668.4993314962.

The spelling of 4644918636 in words is "four billion, six hundred forty-four million, nine hundred eighteen thousand, six hundred thirty-six".