18450616848 has 80 divisors (see below), whose sum is σ = 48929368320. Its totient is φ = 5989082112.

The previous prime is 18450616841. The next prime is 18450616871. The reversal of 18450616848 is 84861605481.

It is a self number, because there is not a number n which added to its sum of digits gives 18450616848.

It is not an unprimeable number, because it can be changed into a prime (18450616841) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 243490 + ... + 310142.

It is an arithmetic number, because the mean of its divisors is an integer number (611617104).

Almost surely, 2^18450616848 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 18450616848, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24464684160).

18450616848 is an abundant number, since it is smaller than the sum of its proper divisors (30478751472).

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

18450616848 is a wasteful number, since it uses less digits than its factorization.

18450616848 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66816 (or 66810 counting only the distinct ones).

The product of its (nonzero) digits is 1474560, while the sum is 51.

The spelling of 18450616848 in words is "eighteen billion, four hundred fifty million, six hundred sixteen thousand, eight hundred forty-eight".