198256882549 has 16 divisors (see below), whose sum is σ = 216916208640. Its totient is φ = 179703846000.

The previous prime is 198256882543. The next prime is 198256882567. The reversal of 198256882549 is 945288652891.

It is a cyclic number.

It is not a de Polignac number, because 198256882549 - 2⁹ = 198256882037 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198256882543) 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, 21803494 + ... + 21812584.

It is an arithmetic number, because the mean of its divisors is an integer number (13557263040).

Almost surely, 2^198256882549 is an apocalyptic number.

It is an amenable number.

198256882549 is a deficient number, since it is larger than the sum of its proper divisors (18659326091).

198256882549 is a wasteful number, since it uses less digits than its factorization.

198256882549 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14712.

The product of its digits is 99532800, while the sum is 67.

The spelling of 198256882549 in words is "one hundred ninety-eight billion, two hundred fifty-six million, eight hundred eighty-two thousand, five hundred forty-nine".