4091856993 has 40 divisors (see below), whose sum is σ = 7226662080. Its totient is φ = 2257567200.

The previous prime is 4091856983. The next prime is 4091857013. The reversal of 4091856993 is 3996581904.

4091856993 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 4091856993 - 2⁵ = 4091856961 is a prime.

It is not an unprimeable number, because it can be changed into a prime (4091856943) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 107983 + ... + 140868.

It is an arithmetic number, because the mean of its divisors is an integer number (180666552).

Almost surely, 2^4091856993 is an apocalyptic number.

It is an amenable number.

4091856993 is a deficient number, since it is larger than the sum of its proper divisors (3134805087).

4091856993 is a wasteful number, since it uses less digits than its factorization.

4091856993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 248899 (or 248890 counting only the distinct ones).

The product of its (nonzero) digits is 2099520, while the sum is 54.

The square root of 4091856993 is about 63967.6245689958. The cubic root of 4091856993 is about 1599.4603639796.

The spelling of 4091856993 in words is "four billion, ninety-one million, eight hundred fifty-six thousand, nine hundred ninety-three".