991656196 has 48 divisors (see below), whose sum is σ = 1824641280. Its totient is φ = 471098880.

The previous prime is 991656181. The next prime is 991656209. The reversal of 991656196 is 691656199.

991656196 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×991656196² = 1966764022130380832, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1947990 + ... + 1948498.

It is an arithmetic number, because the mean of its divisors is an integer number (38013360).

Almost surely, 2^991656196 is an apocalyptic number.

It is an amenable number.

991656196 is a deficient number, since it is larger than the sum of its proper divisors (832985084).

991656196 is a wasteful number, since it uses less digits than its factorization.

991656196 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 844 (or 842 counting only the distinct ones).

The product of its digits is 787320, while the sum is 52.

The square root of 991656196 is about 31490.5731291128. The cubic root of 991656196 is about 997.2109604904.

The spelling of 991656196 in words is "nine hundred ninety-one million, six hundred fifty-six thousand, one hundred ninety-six".