3649518636 has 12 divisors (see below), whose sum is σ = 8515543512. Its totient is φ = 1216506208.

The previous prime is 3649518623. The next prime is 3649518637. The reversal of 3649518636 is 6368159463.

It is a happy number.

3649518636 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×3649518636² = 26637972549022600992, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (3649518637) 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, 152063265 + ... + 152063288.

It is an arithmetic number, because the mean of its divisors is an integer number (709628626).

Almost surely, 2^3649518636 is an apocalyptic number.

It is an amenable number.

3649518636 is an abundant number, since it is smaller than the sum of its proper divisors (4866024876).

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

3649518636 is a wasteful number, since it uses less digits than its factorization.

3649518636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 304126560 (or 304126558 counting only the distinct ones).

The product of its digits is 2799360, while the sum is 51.

The square root of 3649518636 is about 60411.2459398083. The cubic root of 3649518636 is about 1539.6140366316.

The spelling of 3649518636 in words is "three billion, six hundred forty-nine million, five hundred eighteen thousand, six hundred thirty-six".