542220817218 has 8 divisors (see below), whose sum is σ = 1084441634448. Its totient is φ = 180740272404.

The previous prime is 542220817207. The next prime is 542220817219. The reversal of 542220817218 is 812718022245.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

542220817218 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 542220817218.

It is not an unprimeable number, because it can be changed into a prime (542220817219) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 45185068096 + ... + 45185068107.

It is an arithmetic number, because the mean of its divisors is an integer number (135555204306).

Almost surely, 2^542220817218 is an apocalyptic number.

542220817218 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

542220817218 is a wasteful number, since it uses less digits than its factorization.

542220817218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90370136208.

The product of its (nonzero) digits is 143360, while the sum is 42.

The spelling of 542220817218 in words is "five hundred forty-two billion, two hundred twenty million, eight hundred seventeen thousand, two hundred eighteen".