198474902161 has 8 divisors (see below), whose sum is σ = 199559833704. Its totient is φ = 197390753280.

The previous prime is 198474902149. The next prime is 198474902183. The reversal of 198474902161 is 161209474891.

It can be written as a sum of positive squares in 4 ways, for example, as 91509275025 + 106965627136 = 302505^2 + 327056^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-198474902161 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 198474902099 and 198474902108.

It is not an unprimeable number, because it can be changed into a prime (198474909161) 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 7 ways as a sum of consecutive naturals, for example, 316551 + ... + 705091.

It is an arithmetic number, because the mean of its divisors is an integer number (24944979213).

Almost surely, 2^198474902161 is an apocalyptic number.

It is an amenable number.

198474902161 is a deficient number, since it is larger than the sum of its proper divisors (1084931543).

198474902161 is a wasteful number, since it uses less digits than its factorization.

198474902161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 391331.

The product of its (nonzero) digits is 870912, while the sum is 52.

The spelling of 198474902161 in words is "one hundred ninety-eight billion, four hundred seventy-four million, nine hundred two thousand, one hundred sixty-one".