218509751068 has 48 divisors (see below), whose sum is σ = 439426376704. Its totient is φ = 93131596800.

The previous prime is 218509750973. The next prime is 218509751069. The reversal of 218509751068 is 860157905812.

It is a super-2 number, since 2×218509751068² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (218509751069) 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, 26751121 + ... + 26759287.

Almost surely, 2^218509751068 is an apocalyptic number.

218509751068 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

218509751068 is an abundant number, since it is smaller than the sum of its proper divisors (220916625636).

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

218509751068 is a wasteful number, since it uses less digits than its factorization.

218509751068 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13322 (or 13320 counting only the distinct ones).

The product of its (nonzero) digits is 1209600, while the sum is 52.

The spelling of 218509751068 in words is "two hundred eighteen billion, five hundred nine million, seven hundred fifty-one thousand, sixty-eight".