218468840949 has 48 divisors (see below), whose sum is σ = 327341876160. Its totient is φ = 140326629120.

The previous prime is 218468840873. The next prime is 218468840971. The reversal of 218468840949 is 949048864812.

218468840949 is a `hidden beast` number, since 2 + 1 + 8 + 468 + 84 + 0 + 94 + 9 = 666.

It is not a de Polignac number, because 218468840949 - 2²³ = 218460452341 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (218468820949) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 9154737 + ... + 9178569.

It is an arithmetic number, because the mean of its divisors is an integer number (6819622420).

Almost surely, 2^218468840949 is an apocalyptic number.

It is an amenable number.

218468840949 is a deficient number, since it is larger than the sum of its proper divisors (108873035211).

218468840949 is a wasteful number, since it uses less digits than its factorization.

218468840949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24242 (or 24239 counting only the distinct ones).

The product of its (nonzero) digits is 31850496, while the sum is 63.

The spelling of 218468840949 in words is "two hundred eighteen billion, four hundred sixty-eight million, eight hundred forty thousand, nine hundred forty-nine".