198664248765 has 16 divisors (see below), whose sum is σ = 318084648768. Its totient is φ = 105880315776.

The previous prime is 198664248649. The next prime is 198664248821. The reversal of 198664248765 is 567842466891.

It is not a de Polignac number, because 198664248765 - 2⁷ = 198664248637 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 198664248696 and 198664248705.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 4599679 + ... + 4642668.

It is an arithmetic number, because the mean of its divisors is an integer number (19880290548).

Almost surely, 2^198664248765 is an apocalyptic number.

198664248765 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

198664248765 is a deficient number, since it is larger than the sum of its proper divisors (119420400003).

198664248765 is a wasteful number, since it uses less digits than its factorization.

198664248765 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9243788.

The product of its digits is 139345920, while the sum is 66.

The spelling of 198664248765 in words is "one hundred ninety-eight billion, six hundred sixty-four million, two hundred forty-eight thousand, seven hundred sixty-five".