198400756697 has 16 divisors (see below), whose sum is σ = 233777910912. Its totient is φ = 165996069120.

The previous prime is 198400756667. The next prime is 198400756709. The reversal of 198400756697 is 796657004891.

It is a cyclic number.

It is not a de Polignac number, because 198400756697 - 2¹⁰ = 198400755673 is a prime.

It is not an unprimeable number, because it can be changed into a prime (198400756667) 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, 2010293 + ... + 2106674.

It is an arithmetic number, because the mean of its divisors is an integer number (14611119432).

Almost surely, 2^198400756697 is an apocalyptic number.

It is an amenable number.

198400756697 is a deficient number, since it is larger than the sum of its proper divisors (35377154215).

198400756697 is a wasteful number, since it uses less digits than its factorization.

198400756697 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4117328.

The product of its (nonzero) digits is 22861440, while the sum is 62.

The spelling of 198400756697 in words is "one hundred ninety-eight billion, four hundred million, seven hundred fifty-six thousand, six hundred ninety-seven".