3657865216 has 48 divisors (see below), whose sum is σ = 7326675720. Its totient is φ = 1825751040.

The previous prime is 3657865171. The next prime is 3657865217. The reversal of 3657865216 is 6125687563.

It is a self number, because there is not a number n which added to its sum of digits gives 3657865216.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3657865217) 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, 1557355 + ... + 1559701.

Almost surely, 2^3657865216 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 3657865216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3663337860).

3657865216 is an abundant number, since it is smaller than the sum of its proper divisors (3668810504).

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

3657865216 is an equidigital number, since it uses as much as digits as its factorization.

3657865216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3130 (or 3110 counting only the distinct ones).

The product of its digits is 1814400, while the sum is 49.

The square root of 3657865216 is about 60480.2878300029. The cubic root of 3657865216 is about 1540.7868604940.

The spelling of 3657865216 in words is "three billion, six hundred fifty-seven million, eight hundred sixty-five thousand, two hundred sixteen".