4207191661691 has 24 divisors (see below), whose sum is σ = 4516638566400. Its totient is φ = 3917248588080.

The previous prime is 4207191661663. The next prime is 4207191661759. The reversal of 4207191661691 is 1961661917024.

4207191661691 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 4207191661691 - 2¹⁸ = 4207191399547 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4207191664691) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 96228326 + ... + 96272036.

It is an arithmetic number, because the mean of its divisors is an integer number (188193273600).

Almost surely, 2^{4207191661691} is an apocalyptic number.

4207191661691 is a deficient number, since it is larger than the sum of its proper divisors (309446904709).

4207191661691 is a wasteful number, since it uses less digits than its factorization.

4207191661691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48327 (or 48308 counting only the distinct ones).

The product of its (nonzero) digits is 979776, while the sum is 53.

The spelling of 4207191661691 in words is "four trillion, two hundred seven billion, one hundred ninety-one million, six hundred sixty-one thousand, six hundred ninety-one".