198860068891 has 16 divisors (see below), whose sum is σ = 220441844448. Its totient is φ = 177883776000.

The previous prime is 198860068879. The next prime is 198860068931.

198860068891 is nontrivially palindromic in base 10.

It is a cyclic number.

It is not a de Polignac number, because 198860068891 - 2¹³ = 198860060699 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (198860068831) 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, 354060 + ... + 723241.

It is an arithmetic number, because the mean of its divisors is an integer number (13777615278).

Almost surely, 2^198860068891 is an apocalyptic number.

198860068891 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

198860068891 is a deficient number, since it is larger than the sum of its proper divisors (21581775557).

198860068891 is a wasteful number, since it uses less digits than its factorization.

198860068891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1077582.

The product of its (nonzero) digits is 11943936, while the sum is 64.

The spelling of 198860068891 in words is "one hundred ninety-eight billion, eight hundred sixty million, sixty-eight thousand, eight hundred ninety-one".