3649617018 has 24 divisors (see below), whose sum is σ = 8372651508. Its totient is φ = 1144977792.

The previous prime is 3649617017. The next prime is 3649617029. The reversal of 3649617018 is 8107169463.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 3475456209 + 174160809 = 58953^2 + 13197^2 .

It is not an unprimeable number, because it can be changed into a prime (3649617017) 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 11 ways as a sum of consecutive naturals, for example, 5963121 + ... + 5963732.

Almost surely, 2^3649617018 is an apocalyptic number.

3649617018 is an abundant number, since it is smaller than the sum of its proper divisors (4723034490).

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

3649617018 is a wasteful number, since it uses less digits than its factorization.

3649617018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11926878 (or 11926875 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 45.

The square root of 3649617018 is about 60412.0602032409. The cubic root of 3649617018 is about 1539.6278712367.

The spelling of 3649617018 in words is "three billion, six hundred forty-nine million, six hundred seventeen thousand, eighteen".