3999957940191 has 8 divisors (see below), whose sum is σ = 5333293825024. Its totient is φ = 2666630341080.

The previous prime is 3999957940171. The next prime is 3999957940247. The reversal of 3999957940191 is 1910497599993.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-3999957940191 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3999957940171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 840511 + ... + 2950656.

It is an arithmetic number, because the mean of its divisors is an integer number (666661728128).

Almost surely, 2^{3999957940191} is an apocalyptic number.

3999957940191 is a deficient number, since it is larger than the sum of its proper divisors (1333335884833).

3999957940191 is a wasteful number, since it uses less digits than its factorization.

3999957940191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4142861.

The product of its (nonzero) digits is 223205220, while the sum is 75.

The spelling of 3999957940191 in words is "three trillion, nine hundred ninety-nine billion, nine hundred fifty-seven million, nine hundred forty thousand, one hundred ninety-one".