198606618135 has 12 divisors (see below), whose sum is σ = 344251471512. Its totient is φ = 105923529648.

The previous prime is 198606618121. The next prime is 198606618187. The reversal of 198606618135 is 531816606891.

198606618135 is a `hidden beast` number, since 1 + 9 + 8 + 6 + 0 + 6 + 618 + 13 + 5 = 666.

It is not a de Polignac number, because 198606618135 - 2⁵ = 198606618103 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2206740157 + ... + 2206740246.

It is an arithmetic number, because the mean of its divisors is an integer number (28687622626).

Almost surely, 2^198606618135 is an apocalyptic number.

198606618135 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

198606618135 is a deficient number, since it is larger than the sum of its proper divisors (145644853377).

198606618135 is a wasteful number, since it uses less digits than its factorization.

198606618135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4413480414 (or 4413480411 counting only the distinct ones).

The product of its (nonzero) digits is 1866240, while the sum is 54.

The spelling of 198606618135 in words is "one hundred ninety-eight billion, six hundred six million, six hundred eighteen thousand, one hundred thirty-five".