318648044221 has 16 divisors (see below), whose sum is σ = 346146393600. Its totient is φ = 291582396288.

The previous prime is 318648044159. The next prime is 318648044227. The reversal of 318648044221 is 122440846813.

It is a cyclic number.

It is not a de Polignac number, because 318648044221 - 2¹³ = 318648036029 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (318648044227) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1156120 + ... + 1404958.

It is an arithmetic number, because the mean of its divisors is an integer number (21634149600).

Almost surely, 2^318648044221 is an apocalyptic number.

It is an amenable number.

318648044221 is a deficient number, since it is larger than the sum of its proper divisors (27498349379).

318648044221 is a wasteful number, since it uses less digits than its factorization.

318648044221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 249708.

The product of its (nonzero) digits is 294912, while the sum is 43.

The spelling of 318648044221 in words is "three hundred eighteen billion, six hundred forty-eight million, forty-four thousand, two hundred twenty-one".