218578948364 has 24 divisors (see below), whose sum is σ = 452232308640. Its totient is φ = 90446461056.

The previous prime is 218578948307. The next prime is 218578948411. The reversal of 218578948364 is 463849875812.

It is a self number, because there is not a number n which added to its sum of digits gives 218578948364.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 134592137 + ... + 134593760.

It is an arithmetic number, because the mean of its divisors is an integer number (18843012860).

Almost surely, 2^218578948364 is an apocalyptic number.

It is an amenable number.

218578948364 is an abundant number, since it is smaller than the sum of its proper divisors (233653360276).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

218578948364 is a wasteful number, since it uses less digits than its factorization.

218578948364 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 269185937 (or 269185935 counting only the distinct ones).

The product of its digits is 92897280, while the sum is 65.

The spelling of 218578948364 in words is "two hundred eighteen billion, five hundred seventy-eight million, nine hundred forty-eight thousand, three hundred sixty-four".