199317428656 has 20 divisors (see below), whose sum is σ = 386219594104. Its totient is φ = 99647856000.

The previous prime is 199317428641. The next prime is 199317428669. The reversal of 199317428656 is 656824713991.

199317428656 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 199317428594 and 199317428603.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 526170 + ... + 821881.

Almost surely, 2^199317428656 is an apocalyptic number.

199317428656 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

199317428656 is a deficient number, since it is larger than the sum of its proper divisors (186902165448).

199317428656 is a wasteful number, since it uses less digits than its factorization.

199317428656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1357300 (or 1357294 counting only the distinct ones).

The product of its digits is 19595520, while the sum is 61.

The spelling of 199317428656 in words is "one hundred ninety-nine billion, three hundred seventeen million, four hundred twenty-eight thousand, six hundred fifty-six".