188842154521218 has 48 divisors (see below), whose sum is σ = 418884388741728. Its totient is φ = 56286782198400.

The previous prime is 188842154521103. The next prime is 188842154521231. The reversal of 188842154521218 is 812125451248881.

It is a super-2 number, since 2×188842154521218² (a number of 29 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 384226971 + ... + 384718142.

It is an arithmetic number, because the mean of its divisors is an integer number (8726758098786).

Almost surely, 2^{188842154521218} is an apocalyptic number.

188842154521218 is an abundant number, since it is smaller than the sum of its proper divisors (230042234220510).

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

188842154521218 is a wasteful number, since it uses less digits than its factorization.

188842154521218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 768945251 (or 768945190 counting only the distinct ones).

The product of its digits is 13107200, while the sum is 60.

The spelling of 188842154521218 in words is "one hundred eighty-eight trillion, eight hundred forty-two billion, one hundred fifty-four million, five hundred twenty-one thousand, two hundred eighteen".