849171974533 has 2 divisors, whose sum is σ = 849171974534. Its totient is φ = 849171974532.

The previous prime is 849171974491. The next prime is 849171974551. The reversal of 849171974533 is 335479171948.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 846221529409 + 2950445124 = 919903^2 + 54318^2 .

It is a cyclic number.

It is not a de Polignac number, because 849171974533 - 2²⁹ = 848635103621 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (849171972533) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 424585987266 + 424585987267.

It is an arithmetic number, because the mean of its divisors is an integer number (424585987267).

Almost surely, 2^849171974533 is an apocalyptic number.

It is an amenable number.

849171974533 is a deficient number, since it is larger than the sum of its proper divisors (1).

849171974533 is an equidigital number, since it uses as much as digits as its factorization.

849171974533 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 22861440, while the sum is 61.

The spelling of 849171974533 in words is "eight hundred forty-nine billion, one hundred seventy-one million, nine hundred seventy-four thousand, five hundred thirty-three".