83811016959191 has 4 divisors (see below), whose sum is σ = 84208225570584. Its totient is φ = 83413808347800.

The previous prime is 83811016959169. The next prime is 83811016959233. The reversal of 83811016959191 is 19195961011838.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 83811016959191 - 2¹⁸ = 83811016697047 is a prime.

It is a super-3 number, since 3×83811016959191³ (a number of 43 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83811016959491) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 198604305380 + ... + 198604305801.

It is an arithmetic number, because the mean of its divisors is an integer number (21052056392646).

Almost surely, 2^{83811016959191} is an apocalyptic number.

83811016959191 is a deficient number, since it is larger than the sum of its proper divisors (397208611393).

83811016959191 is a wasteful number, since it uses less digits than its factorization.

83811016959191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 397208611392.

The product of its (nonzero) digits is 4199040, while the sum is 62.

The spelling of 83811016959191 in words is "eighty-three trillion, eight hundred eleven billion, sixteen million, nine hundred fifty-nine thousand, one hundred ninety-one".