198421738024512 has 112 divisors (see below), whose sum is σ = 528371075701760. Its totient is φ = 65714968908288.

The previous prime is 198421738024501. The next prime is 198421738024577. The reversal of 198421738024512 is 215420837124891.

198421738024512 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×198421738024512² (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 15 ways as a sum of consecutive naturals, for example, 102916293 + ... + 104826555.

Almost surely, 2^{198421738024512} is an apocalyptic number.

198421738024512 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 198421738024512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (264185537850880).

198421738024512 is an abundant number, since it is smaller than the sum of its proper divisors (329949337677248).

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

198421738024512 is a wasteful number, since it uses less digits than its factorization.

198421738024512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1913760 (or 1913750 counting only the distinct ones).

The product of its (nonzero) digits is 7741440, while the sum is 57.

The spelling of 198421738024512 in words is "one hundred ninety-eight trillion, four hundred twenty-one billion, seven hundred thirty-eight million, twenty-four thousand, five hundred twelve".