198645105 has 16 divisors (see below), whose sum is σ = 321857280. Its totient is φ = 104602368.

The previous prime is 198645101. The next prime is 198645107. The reversal of 198645105 is 501546891.

It is not a de Polignac number, because 198645105 - 2² = 198645101 is a prime.

It is a super-2 number, since 2×198645105² = 78919755480922050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (198645101) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 82632 + ... + 85001.

It is an arithmetic number, because the mean of its divisors is an integer number (20116080).

Almost surely, 2^198645105 is an apocalyptic number.

198645105 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

198645105 is a deficient number, since it is larger than the sum of its proper divisors (123212175).

198645105 is a wasteful number, since it uses less digits than its factorization.

198645105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 167720.

The product of its (nonzero) digits is 43200, while the sum is 39.

The square root of 198645105 is about 14094.1514466108. The cubic root of 198645105 is about 583.4799752873.

The spelling of 198645105 in words is "one hundred ninety-eight million, six hundred forty-five thousand, one hundred five".