3621685824 has 112 divisors (see below), whose sum is σ = 10702137600. Its totient is φ = 1200987648.

The previous prime is 3621685813. The next prime is 3621685829. The reversal of 3621685824 is 4285861263.

3621685824 is a `hidden beast` number, since 3 + 6 + 2 + 1 + 68 + 582 + 4 = 666.

3621685824 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 3621685824.

It is not an unprimeable number, because it can be changed into a prime (3621685829) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 335097 + ... + 345735.

It is an arithmetic number, because the mean of its divisors is an integer number (95554800).

Almost surely, 2^3621685824 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 3621685824, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5351068800).

3621685824 is an abundant number, since it is smaller than the sum of its proper divisors (7080451776).

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

3621685824 is a wasteful number, since it uses less digits than its factorization.

3621685824 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10857 (or 10841 counting only the distinct ones).

The product of its digits is 552960, while the sum is 45.

The square root of 3621685824 is about 60180.4438667579. The cubic root of 3621685824 is about 1535.6901230356.

The spelling of 3621685824 in words is "three billion, six hundred twenty-one million, six hundred eighty-five thousand, eight hundred twenty-four".