198584455665 has 32 divisors (see below), whose sum is σ = 325182274560. Its totient is φ = 103430206656.

The previous prime is 198584455661. The next prime is 198584455681. The reversal of 198584455665 is 566554485891.

It is not a de Polignac number, because 198584455665 - 2² = 198584455661 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 198584455596 and 198584455605.

It is not an unprimeable number, because it can be changed into a prime (198584455661) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4066966 + ... + 4115504.

It is an arithmetic number, because the mean of its divisors is an integer number (10161946080).

Almost surely, 2^198584455665 is an apocalyptic number.

198584455665 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

198584455665 is a deficient number, since it is larger than the sum of its proper divisors (126597818895).

198584455665 is a wasteful number, since it uses less digits than its factorization.

198584455665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54933.

The product of its digits is 207360000, while the sum is 66.

The spelling of 198584455665 in words is "one hundred ninety-eight billion, five hundred eighty-four million, four hundred fifty-five thousand, six hundred sixty-five".