3661185216 has 56 divisors (see below), whose sum is σ = 10432038064. Its totient is φ = 1126517760.

The previous prime is 3661185211. The next prime is 3661185277. The reversal of 3661185216 is 6125811663.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (3661185211) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 730915 + ... + 735906.

It is an arithmetic number, because the mean of its divisors is an integer number (186286394).

Almost surely, 2^3661185216 is an apocalyptic number.

It is an amenable number.

3661185216 is an abundant number, since it is smaller than the sum of its proper divisors (6770852848).

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

3661185216 is a wasteful number, since it uses less digits than its factorization.

3661185216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1466849 (or 1466839 counting only the distinct ones).

The product of its digits is 51840, while the sum is 39.

The square root of 3661185216 is about 60507.7285642091. The cubic root of 3661185216 is about 1541.2528759807.

Adding to 3661185216 its reverse (6125811663), we get a palindrome (9786996879).

The spelling of 3661185216 in words is "three billion, six hundred sixty-one million, one hundred eighty-five thousand, two hundred sixteen".