4781621736 has 96 divisors (see below), whose sum is σ = 13155068160. Its totient is φ = 1568854656.

The previous prime is 4781621723. The next prime is 4781621759. The reversal of 4781621736 is 6371261874.

4781621736 is a `hidden beast` number, since 478 + 1 + 6 + 2 + 173 + 6 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 4781621691 and 4781621700.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 1281105 + ... + 1284831.

It is an arithmetic number, because the mean of its divisors is an integer number (137031960).

Almost surely, 2^4781621736 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 4781621736, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6577534080).

4781621736 is an abundant number, since it is smaller than the sum of its proper divisors (8373446424).

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

4781621736 is a wasteful number, since it uses less digits than its factorization.

4781621736 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4015 (or 4008 counting only the distinct ones).

The product of its digits is 338688, while the sum is 45.

The square root of 4781621736 is about 69149.2714061399. The cubic root of 4781621736 is about 1684.7096842710.

The spelling of 4781621736 in words is "four billion, seven hundred eighty-one million, six hundred twenty-one thousand, seven hundred thirty-six".