199935656697 has 32 divisors (see below), whose sum is σ = 320337008640. Its totient is φ = 108447356160.

The previous prime is 199935656633. The next prime is 199935656699. The reversal of 199935656697 is 796656539991.

It is not a de Polignac number, because 199935656697 - 2⁶ = 199935656633 is a prime.

It is not an unprimeable number, because it can be changed into a prime (199935656699) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1516672 + ... + 1643217.

It is an arithmetic number, because the mean of its divisors is an integer number (10010531520).

Almost surely, 2^199935656697 is an apocalyptic number.

It is an amenable number.

199935656697 is a deficient number, since it is larger than the sum of its proper divisors (120401351943).

199935656697 is a wasteful number, since it uses less digits than its factorization.

199935656697 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3160053.

The product of its digits is 744017400, while the sum is 75.

The spelling of 199935656697 in words is "one hundred ninety-nine billion, nine hundred thirty-five million, six hundred fifty-six thousand, six hundred ninety-seven".