3621516720 has 160 divisors (see below), whose sum is σ = 11622113280. Its totient is φ = 931906560.

The previous prime is 3621516719. The next prime is 3621516737. The reversal of 3621516720 is 276151263.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5036521 + ... + 5037239.

It is an arithmetic number, because the mean of its divisors is an integer number (72638208).

Almost surely, 2^3621516720 is an apocalyptic number.

3621516720 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3621516720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5811056640).

3621516720 is an abundant number, since it is smaller than the sum of its proper divisors (8000596560).

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

3621516720 is a wasteful number, since it uses less digits than its factorization.

3621516720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1443 (or 1437 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 33.

The square root of 3621516720 is about 60179.0388756750. The cubic root of 3621516720 is about 1535.6662211478. Note that the first 3 decimals are identical.

Adding to 3621516720 its reverse (276151263), we get a palindrome (3897667983).

The spelling of 3621516720 in words is "three billion, six hundred twenty-one million, five hundred sixteen thousand, seven hundred twenty".