3649643236 has 12 divisors (see below), whose sum is σ = 6452720428. Its totient is φ = 1806008832.

The previous prime is 3649643219. The next prime is 3649643251. The reversal of 3649643236 is 6323469463.

It can be written as a sum of positive squares in 2 ways, for example, as 501760000 + 3147883236 = 22400^2 + 56106^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4702761 + ... + 4703536.

Almost surely, 2^3649643236 is an apocalyptic number.

It is an amenable number.

3649643236 is a deficient number, since it is larger than the sum of its proper divisors (2803077192).

3649643236 is a wasteful number, since it uses less digits than its factorization.

3649643236 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9406398 (or 9406396 counting only the distinct ones).

The product of its digits is 1679616, while the sum is 46.

The square root of 3649643236 is about 60412.2771959475. The cubic root of 3649643236 is about 1539.6315580041.

The spelling of 3649643236 in words is "three billion, six hundred forty-nine million, six hundred forty-three thousand, two hundred thirty-six".