198818601 has 32 divisors (see below), whose sum is σ = 285769728. Its totient is φ = 122654400.

The previous prime is 198818579. The next prime is 198818611. The reversal of 198818601 is 106818891.

It is not a de Polignac number, because 198818601 - 2¹⁴ = 198802217 is a prime.

It is a super-2 number, since 2×198818601² = 79057672207194402, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (198818611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 327240 + ... + 327846.

It is an arithmetic number, because the mean of its divisors is an integer number (8930304).

Almost surely, 2^198818601 is an apocalyptic number.

It is an amenable number.

198818601 is a deficient number, since it is larger than the sum of its proper divisors (86951127).

198818601 is a wasteful number, since it uses less digits than its factorization.

198818601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 781.

The product of its (nonzero) digits is 27648, while the sum is 42.

The square root of 198818601 is about 14100.3049967013. The cubic root of 198818601 is about 583.6497957054.

It can be divided in two parts, 19881 and 8601, that added together give a palindrome (28482).

The spelling of 198818601 in words is "one hundred ninety-eight million, eight hundred eighteen thousand, six hundred one".