18178053052328 has 64 divisors (see below), whose sum is σ = 37703785353360. Its totient is φ = 8161806053376.

The previous prime is 18178053052319. The next prime is 18178053052373. The reversal of 18178053052328 is 82325035087181.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 17011648732324 + 1166404320004 = 4124518^2 + 1080002^2 .

It is a super-2 number, since 2×18178053052328² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 18178053052328.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23777600 + ... + 24530192.

Almost surely, 2^{18178053052328} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18178053052328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18851892676680).

18178053052328 is an abundant number, since it is smaller than the sum of its proper divisors (19525732301032).

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

18178053052328 is a wasteful number, since it uses less digits than its factorization.

18178053052328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 758926 (or 758922 counting only the distinct ones).

The product of its (nonzero) digits is 3225600, while the sum is 53.

The spelling of 18178053052328 in words is "eighteen trillion, one hundred seventy-eight billion, fifty-three million, fifty-two thousand, three hundred twenty-eight".