218301857136 has 120 divisors (see below), whose sum is σ = 691166845824. Its totient is φ = 66152064960.

The previous prime is 218301857129. The next prime is 218301857149. The reversal of 218301857136 is 631758103812.

It is a happy number.

218301857136 is a `hidden beast` number, since 2 + 1 + 8 + 30 + 18 + 571 + 36 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 218301857091 and 218301857100.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2509396 + ... + 2594931.

Almost surely, 2^218301857136 is an apocalyptic number.

It is an amenable number.

218301857136 is an abundant number, since it is smaller than the sum of its proper divisors (472864988688).

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

218301857136 is a wasteful number, since it uses less digits than its factorization.

218301857136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5104361 (or 5104343 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 45.

The spelling of 218301857136 in words is "two hundred eighteen billion, three hundred one million, eight hundred fifty-seven thousand, one hundred thirty-six".