198694543027 has 4 divisors (see below), whose sum is σ = 200028063600. Its totient is φ = 197361022456.

The previous prime is 198694543001. The next prime is 198694543057. The reversal of 198694543027 is 720345496891.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-198694543027 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (198694543057) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 666760063 + ... + 666760360.

It is an arithmetic number, because the mean of its divisors is an integer number (50007015900).

It is a 1-persistent number, because it is pandigital, but 2⋅198694543027 = 397389086054 is not.

Almost surely, 2^198694543027 is an apocalyptic number.

198694543027 is a deficient number, since it is larger than the sum of its proper divisors (1333520573).

198694543027 is a wasteful number, since it uses less digits than its factorization.

198694543027 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1333520572.

The product of its (nonzero) digits is 13063680, while the sum is 58.

The spelling of 198694543027 in words is "one hundred ninety-eight billion, six hundred ninety-four million, five hundred forty-three thousand, twenty-seven".