844165088549 has 2 divisors, whose sum is σ = 844165088550. Its totient is φ = 844165088548.

The previous prime is 844165088489. The next prime is 844165088573. The reversal of 844165088549 is 945880561448.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 433293062500 + 410872026049 = 658250^2 + 640993^2 .

It is a cyclic number.

It is not a de Polignac number, because 844165088549 - 2³⁶ = 775445611813 is a prime.

It is a super-2 number, since 2×844165088549² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 844165088491 and 844165088500.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (844165088149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 422082544274 + 422082544275.

It is an arithmetic number, because the mean of its divisors is an integer number (422082544275).

Almost surely, 2^844165088549 is an apocalyptic number.

It is an amenable number.

844165088549 is a deficient number, since it is larger than the sum of its proper divisors (1).

844165088549 is an equidigital number, since it uses as much as digits as its factorization.

844165088549 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 44236800, while the sum is 62.

The spelling of 844165088549 in words is "eight hundred forty-four billion, one hundred sixty-five million, eighty-eight thousand, five hundred forty-nine".