218560666065812 has 24 divisors (see below), whose sum is σ = 437383238355840. Its totient is φ = 93612734123040.

The previous prime is 218560666065779. The next prime is 218560666065821.

It is a happy number.

218560666065812 is nontrivially palindromic in base 10.

It is a super-2 number, since 2×218560666065812² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

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, 2338400864 + ... + 2338494327.

It is an arithmetic number, because the mean of its divisors is an integer number (18224301598160).

Almost surely, 2^{218560666065812} is an apocalyptic number.

It is an amenable number.

218560666065812 is an abundant number, since it is smaller than the sum of its proper divisors (218822572290028).

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

218560666065812 is a wasteful number, since it uses less digits than its factorization.

218560666065812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4676896871 (or 4676896869 counting only the distinct ones).

The product of its (nonzero) digits is 49766400, while the sum is 62.

The spelling of 218560666065812 in words is "two hundred eighteen trillion, five hundred sixty billion, six hundred sixty-six million, sixty-five thousand, eight hundred twelve".