198213516505 has 8 divisors (see below), whose sum is σ = 246058158600. Its totient is φ = 153102854016.

The previous prime is 198213516491. The next prime is 198213516539. The reversal of 198213516505 is 505615312891.

It can be written as a sum of positive squares in 4 ways, for example, as 16284822544 + 181928693961 = 127612^2 + 426531^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 198213516505 - 2¹³ = 198213508313 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 683494740 + ... + 683495029.

It is an arithmetic number, because the mean of its divisors is an integer number (30757269825).

Almost surely, 2^198213516505 is an apocalyptic number.

It is an amenable number.

198213516505 is a deficient number, since it is larger than the sum of its proper divisors (47844642095).

198213516505 is a wasteful number, since it uses less digits than its factorization.

198213516505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1366989803.

The product of its (nonzero) digits is 324000, while the sum is 46.

The spelling of 198213516505 in words is "one hundred ninety-eight billion, two hundred thirteen million, five hundred sixteen thousand, five hundred five".