198487690815 has 16 divisors (see below), whose sum is σ = 317605786848. Its totient is φ = 105851607936.

The previous prime is 198487690693. The next prime is 198487690867. The reversal of 198487690815 is 518096784891.

It is not a de Polignac number, because 198487690815 - 2¹¹ = 198487688767 is a prime.

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, 335364 + ... + 713753.

It is an arithmetic number, because the mean of its divisors is an integer number (19850361678).

Almost surely, 2^198487690815 is an apocalyptic number.

198487690815 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

198487690815 is a deficient number, since it is larger than the sum of its proper divisors (119118096033).

198487690815 is a wasteful number, since it uses less digits than its factorization.

198487690815 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1061738.

The product of its (nonzero) digits is 34836480, while the sum is 66.

The spelling of 198487690815 in words is "one hundred ninety-eight billion, four hundred eighty-seven million, six hundred ninety thousand, eight hundred fifteen".