3721641216 has 72 divisors (see below), whose sum is σ = 9917651520. Its totient is φ = 1238962176.

The previous prime is 3721641211. The next prime is 3721641223. The reversal of 3721641216 is 6121461273.

It is a super-2 number, since 2×3721641216² = 27701226681259917312, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3721641211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 703156 + ... + 708428.

It is an arithmetic number, because the mean of its divisors is an integer number (137745160).

Almost surely, 2^3721641216 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 3721641216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4958825760).

3721641216 is an abundant number, since it is smaller than the sum of its proper divisors (6196010304).

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

3721641216 is an equidigital number, since it uses as much as digits as its factorization.

3721641216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6211 (or 6197 counting only the distinct ones).

The product of its digits is 12096, while the sum is 33.

The square root of 3721641216 is about 61005.2556424444. The cubic root of 3721641216 is about 1549.6900130701.

The spelling of 3721641216 in words is "three billion, seven hundred twenty-one million, six hundred forty-one thousand, two hundred sixteen".