198818656 has 12 divisors (see below), whose sum is σ = 391424292. Its totient is φ = 99409312.

The previous prime is 198818651. The next prime is 198818657. The reversal of 198818656 is 656818891.

198818656 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198818651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3106510 + ... + 3106573.

It is an arithmetic number, because the mean of its divisors is an integer number (32618691).

Almost surely, 2^198818656 is an apocalyptic number.

198818656 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

198818656 is a deficient number, since it is larger than the sum of its proper divisors (192605636).

198818656 is an equidigital number, since it uses as much as digits as its factorization.

198818656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6213093 (or 6213085 counting only the distinct ones).

The product of its digits is 829440, while the sum is 52.

The square root of 198818656 is about 14100.3069470136. The cubic root of 198818656 is about 583.6498495246.

The spelling of 198818656 in words is "one hundred ninety-eight million, eight hundred eighteen thousand, six hundred fifty-six".