198201961804164 has 12 divisors (see below), whose sum is σ = 462471244209744. Its totient is φ = 66067320601384.

The previous prime is 198201961804159. The next prime is 198201961804177. The reversal of 198201961804164 is 461408169102891.

It is a tau number, because it is divible by the number of its divisors (12).

It is a junction number, because it is equal to n+sod(n) for n = 198201961804098 and 198201961804107.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8258415075162 + ... + 8258415075185.

It is an arithmetic number, because the mean of its divisors is an integer number (38539270350812).

Almost surely, 2^{198201961804164} is an apocalyptic number.

It is an amenable number.

198201961804164 is an abundant number, since it is smaller than the sum of its proper divisors (264269282405580).

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

198201961804164 is a wasteful number, since it uses less digits than its factorization.

198201961804164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16516830150354 (or 16516830150352 counting only the distinct ones).

The product of its (nonzero) digits is 5971968, while the sum is 60.

The spelling of 198201961804164 in words is "one hundred ninety-eight trillion, two hundred one billion, nine hundred sixty-one million, eight hundred four thousand, one hundred sixty-four".