198955955 has 16 divisors (see below), whose sum is σ = 261321984. Its totient is φ = 144211680.

The previous prime is 198955943. The next prime is 198955997. The reversal of 198955955 is 559559891.

It is not a de Polignac number, because 198955955 - 2⁸ = 198955699 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 198955955.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10994 + ... + 22776.

It is an arithmetic number, because the mean of its divisors is an integer number (16332624).

Almost surely, 2^198955955 is an apocalyptic number.

198955955 is a deficient number, since it is larger than the sum of its proper divisors (62366029).

198955955 is a wasteful number, since it uses less digits than its factorization.

198955955 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12106.

The product of its digits is 3645000, while the sum is 56.

The square root of 198955955 is about 14105.1747596405. The cubic root of 198955955 is about 583.7841697523.

The spelling of 198955955 in words is "one hundred ninety-eight million, nine hundred fifty-five thousand, nine hundred fifty-five".