83849307791 has 16 divisors (see below), whose sum is σ = 89469308160. Its totient is φ = 78306232320.

The previous prime is 83849307781. The next prime is 83849307793. The reversal of 83849307791 is 19770394838.

It is a de Polignac number, because none of the positive numbers 2^k-83849307791 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 83849307791.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83849307793) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6325931 + ... + 6339171.

It is an arithmetic number, because the mean of its divisors is an integer number (5591831760).

Almost surely, 2^83849307791 is an apocalyptic number.

83849307791 is a deficient number, since it is larger than the sum of its proper divisors (5620000369).

83849307791 is a wasteful number, since it uses less digits than its factorization.

83849307791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16114.

The product of its (nonzero) digits is 9144576, while the sum is 59.

The spelling of 83849307791 in words is "eighty-three billion, eight hundred forty-nine million, three hundred seven thousand, seven hundred ninety-one".