83191661911 has 16 divisors (see below), whose sum is σ = 84656858400. Its totient is φ = 81735948288.

The previous prime is 83191661893. The next prime is 83191661923. The reversal of 83191661911 is 11916619138.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-83191661911 is a prime.

It is a super-2 number, since 2×83191661911² (a number of 23 digits) contains 22 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 (83191661981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22998375 + ... + 23001991.

It is an arithmetic number, because the mean of its divisors is an integer number (5291053650).

Almost surely, 2^83191661911 is an apocalyptic number.

83191661911 is a deficient number, since it is larger than the sum of its proper divisors (1465196489).

83191661911 is a wasteful number, since it uses less digits than its factorization.

83191661911 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4818.

The product of its digits is 69984, while the sum is 46.

The spelling of 83191661911 in words is "eighty-three billion, one hundred ninety-one million, six hundred sixty-one thousand, nine hundred eleven".