4991309956 has 24 divisors (see below), whose sum is σ = 9735374880. Its totient is φ = 2225227392.

The previous prime is 4991309941. The next prime is 4991309977. The reversal of 4991309956 is 6599031994.

It is a junction number, because it is equal to n+sod(n) for n = 4991309897 and 4991309906.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1930330 + ... + 1932913.

It is an arithmetic number, because the mean of its divisors is an integer number (405640620).

Almost surely, 2^4991309956 is an apocalyptic number.

It is an amenable number.

4991309956 is a deficient number, since it is larger than the sum of its proper divisors (4744064924).

4991309956 is a wasteful number, since it uses less digits than its factorization.

4991309956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3863283 (or 3863281 counting only the distinct ones).

The product of its (nonzero) digits is 2361960, while the sum is 55.

The square root of 4991309956 is about 70649.2035057721. The cubic root of 4991309956 is about 1708.9847211208.

The spelling of 4991309956 in words is "four billion, nine hundred ninety-one million, three hundred nine thousand, nine hundred fifty-six".