2006644636 has 12 divisors (see below), whose sum is σ = 3512059600. Its totient is φ = 1003199040.

The previous prime is 2006644613. The next prime is 2006644667. The reversal of 2006644636 is 6364466002.

It is a junction number, because it is equal to n+sod(n) for n = 2006644595 and 2006644604.

It is a congruent number.

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, 12601 + ... + 64591.

Almost surely, 2^2006644636 is an apocalyptic number.

It is an amenable number.

2006644636 is a deficient number, since it is larger than the sum of its proper divisors (1505414964).

2006644636 is a wasteful number, since it uses less digits than its factorization.

2006644636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61644 (or 61642 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 37.

The square root of 2006644636 is about 44795.5872380305. The cubic root of 2006644636 is about 1261.3147936734.

The spelling of 2006644636 in words is "two billion, six million, six hundred forty-four thousand, six hundred thirty-six".