198771949474 has 32 divisors (see below), whose sum is σ = 341628731136. Its totient is φ = 84969051840.

The previous prime is 198771949451. The next prime is 198771949549. The reversal of 198771949474 is 474949177891.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9237472 + ... + 9258964.

It is an arithmetic number, because the mean of its divisors is an integer number (10675897848).

Almost surely, 2^198771949474 is an apocalyptic number.

198771949474 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

198771949474 is a deficient number, since it is larger than the sum of its proper divisors (142856781662).

198771949474 is a wasteful number, since it uses less digits than its factorization.

198771949474 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23170.

The product of its digits is 128024064, while the sum is 70.

The spelling of 198771949474 in words is "one hundred ninety-eight billion, seven hundred seventy-one million, nine hundred forty-nine thousand, four hundred seventy-four".