191316656 has 20 divisors (see below), whose sum is σ = 371094552. Its totient is φ = 95550336.

The previous prime is 191316647. The next prime is 191316661. The reversal of 191316656 is 656613191.

It is a happy number.

It is a hoax number, since the sum of its digits (38) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8975 + ... + 21521.

Almost surely, 2^191316656 is an apocalyptic number.

191316656 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

191316656 is a deficient number, since it is larger than the sum of its proper divisors (179777896).

191316656 is a wasteful number, since it uses less digits than its factorization.

191316656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13508 (or 13502 counting only the distinct ones).

The product of its digits is 29160, while the sum is 38.

The square root of 191316656 is about 13831.7264287579. The cubic root of 191316656 is about 576.2146030334.

The spelling of 191316656 in words is "one hundred ninety-one million, three hundred sixteen thousand, six hundred fifty-six".