3621712500 has 540 divisors, whose sum is σ = 13954755276. Its totient is φ = 816480000.

The previous prime is 3621712483. The next prime is 3621712519. The reversal of 3621712500 is 52171263.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 2894655204 + 727057296 = 53802^2 + 26964^2 .

It is a tau number, because it is divible by the number of its divisors (540).

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 179 ways as a sum of consecutive naturals, for example, 49612464 + ... + 49612536.

Almost surely, 2^3621712500 is an apocalyptic number.

3621712500 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 3621712500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6977377638).

3621712500 is an abundant number, since it is smaller than the sum of its proper divisors (10333042776).

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

3621712500 is an equidigital number, since it uses as much as digits as its factorization.

3621712500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128 (or 90 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 27.

The square root of 3621712500 is about 60180.6654998098. The cubic root of 3621712500 is about 1535.6938934684.

Adding to 3621712500 its reverse (52171263), we get a palindrome (3673883763).

The spelling of 3621712500 in words is "three billion, six hundred twenty-one million, seven hundred twelve thousand, five hundred".