3640221221016 has 16 divisors (see below), whose sum is σ = 9100553052600. Its totient is φ = 1213407073664.

The previous prime is 3640221221011. The next prime is 3640221221029. The reversal of 3640221221016 is 6101221220463.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3640221221011) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 75837942081 + ... + 75837942128.

Almost surely, 2^{3640221221016} is an apocalyptic number.

It is an amenable number.

3640221221016 is an abundant number, since it is smaller than the sum of its proper divisors (5460331831584).

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

3640221221016 is a wasteful number, since it uses less digits than its factorization.

3640221221016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151675884218 (or 151675884214 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 30.

Adding to 3640221221016 its reverse (6101221220463), we get a palindrome (9741442441479).

The spelling of 3640221221016 in words is "three trillion, six hundred forty billion, two hundred twenty-one million, two hundred twenty-one thousand, sixteen".