849546513181 has 2 divisors, whose sum is σ = 849546513182. Its totient is φ = 849546513180.

The previous prime is 849546513139. The next prime is 849546513187. The reversal of 849546513181 is 181315645948.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 848323892025 + 1222621156 = 921045^2 + 34966^2 .

It is a cyclic number.

It is not a de Polignac number, because 849546513181 - 2³⁹ = 299790699293 is a prime.

It is a super-2 number, since 2×849546513181² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (849546513187) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 424773256590 + 424773256591.

It is an arithmetic number, because the mean of its divisors is an integer number (424773256591).

Almost surely, 2^849546513181 is an apocalyptic number.

It is an amenable number.

849546513181 is a deficient number, since it is larger than the sum of its proper divisors (1).

849546513181 is an equidigital number, since it uses as much as digits as its factorization.

849546513181 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4147200, while the sum is 55.

The spelling of 849546513181 in words is "eight hundred forty-nine billion, five hundred forty-six million, five hundred thirteen thousand, one hundred eighty-one".