198728792294399 has 16 divisors (see below), whose sum is σ = 202698090178560. Its totient is φ = 194793976524000.

The previous prime is 198728792294369. The next prime is 198728792294423. The reversal of 198728792294399 is 993492297827891.

It is a Cunningham number, because it is equal to 14097120²-1.

It is a cyclic number.

It is not a de Polignac number, because 198728792294399 - 2³⁶ = 198660072817663 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 (198728792294339) 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, 7048562 + ... + 21145680.

It is an arithmetic number, because the mean of its divisors is an integer number (12668630636160).

Almost surely, 2^{198728792294399} is an apocalyptic number.

198728792294399 is a deficient number, since it is larger than the sum of its proper divisors (3969297884161).

198728792294399 is a wasteful number, since it uses less digits than its factorization.

198728792294399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14098342.

The product of its digits is 17777055744, while the sum is 89.

The spelling of 198728792294399 in words is "one hundred ninety-eight trillion, seven hundred twenty-eight billion, seven hundred ninety-two million, two hundred ninety-four thousand, three hundred ninety-nine".