18448390325568 has 896 divisors, whose sum is σ = 61575818895360. Its totient is φ = 4757667840000.

The previous prime is 18448390325557. The next prime is 18448390325581. The reversal of 18448390325568 is 86552309384481.

It is a junction number, because it is equal to n+sod(n) for n = 18448390325499 and 18448390325508.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 9643694980 + ... + 9643696892.

It is an arithmetic number, because the mean of its divisors is an integer number (68723012160).

Almost surely, 2^{18448390325568} 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 18448390325568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30787909447680).

18448390325568 is an abundant number, since it is smaller than the sum of its proper divisors (43127428569792).

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

18448390325568 is a wasteful number, since it uses less digits than its factorization.

18448390325568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2207 (or 2197 counting only the distinct ones).

The product of its (nonzero) digits is 199065600, while the sum is 66.

The spelling of 18448390325568 in words is "eighteen trillion, four hundred forty-eight billion, three hundred ninety million, three hundred twenty-five thousand, five hundred sixty-eight".