4418900643506 has 8 divisors (see below), whose sum is σ = 6636085333020. Its totient is φ = 2206872199168.

The previous prime is 4418900643503. The next prime is 4418900643533. The reversal of 4418900643506 is 6053460098144.

It can be written as a sum of positive squares in 2 ways, for example, as 2935023402481 + 1483877241025 = 1713191^2 + 1218145^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (4418900643503) 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 3 ways as a sum of consecutive naturals, for example, 1289059151 + ... + 1289062578.

Almost surely, 2^{4418900643506} is an apocalyptic number.

4418900643506 is a deficient number, since it is larger than the sum of its proper divisors (2217184689514).

4418900643506 is a wasteful number, since it uses less digits than its factorization.

4418900643506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2578122588.

The product of its (nonzero) digits is 2488320, while the sum is 50.

The spelling of 4418900643506 in words is "four trillion, four hundred eighteen billion, nine hundred million, six hundred forty-three thousand, five hundred six".