199199513898 has 384 divisors, whose sum is σ = 598750617600. Its totient is φ = 49005946080.

The previous prime is 199199513897. The next prime is 199199513911. The reversal of 199199513898 is 898315991991.

199199513898 is a `hidden beast` number, since 1 + 9 + 9 + 19 + 9 + 513 + 8 + 98 = 666.

It is not an unprimeable number, because it can be changed into a prime (199199513893) by changing a digit.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 44791911 + ... + 44796357.

It is an arithmetic number, because the mean of its divisors is an integer number (1559246400).

Almost surely, 2^199199513898 is an apocalyptic number.

199199513898 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 199199513898, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (299375308800).

199199513898 is an abundant number, since it is smaller than the sum of its proper divisors (399551103702).

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

199199513898 is a wasteful number, since it uses less digits than its factorization.

199199513898 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4514 (or 4489 counting only the distinct ones).

The product of its digits is 56687040, while the sum is 72.

The spelling of 199199513898 in words is "one hundred ninety-nine billion, one hundred ninety-nine million, five hundred thirteen thousand, eight hundred ninety-eight".