3644200666503 has 12 divisors (see below), whose sum is σ = 5280662808720. Its totient is φ = 2421705233376.

The previous prime is 3644200666481. The next prime is 3644200666511. The reversal of 3644200666503 is 3056660024463.

It is not a de Polignac number, because 3644200666503 - 2¹² = 3644200662407 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3644200666583) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 646820163 + ... + 646825796.

It is an arithmetic number, because the mean of its divisors is an integer number (440055234060).

Almost surely, 2^{3644200666503} is an apocalyptic number.

3644200666503 is a deficient number, since it is larger than the sum of its proper divisors (1636462142217).

3644200666503 is a wasteful number, since it uses less digits than its factorization.

3644200666503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1293646278 (or 1293646275 counting only the distinct ones).

The product of its (nonzero) digits is 1866240, while the sum is 45.

The spelling of 3644200666503 in words is "three trillion, six hundred forty-four billion, two hundred million, six hundred sixty-six thousand, five hundred three".