198546864539 has 2 divisors, whose sum is σ = 198546864540. Its totient is φ = 198546864538.

The previous prime is 198546864521. The next prime is 198546864553. The reversal of 198546864539 is 935468645891.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 198546864539 - 2⁸ = 198546864283 is a prime.

It is not a weakly prime, because it can be changed into another prime (198546864569) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99273432269 + 99273432270.

It is an arithmetic number, because the mean of its divisors is an integer number (99273432270).

Almost surely, 2^198546864539 is an apocalyptic number.

198546864539 is a deficient number, since it is larger than the sum of its proper divisors (1).

198546864539 is an equidigital number, since it uses as much as digits as its factorization.

198546864539 is an evil number, because the sum of its binary digits is even.

The product of its digits is 223948800, while the sum is 68.

The spelling of 198546864539 in words is "one hundred ninety-eight billion, five hundred forty-six million, eight hundred sixty-four thousand, five hundred thirty-nine".