1779849332289 has 18 divisors (see below), whose sum is σ = 2990631191730. Its totient is φ = 1017056761056.

The previous prime is 1779849332251. The next prime is 1779849332347. The reversal of 1779849332289 is 9822339489771.

1779849332289 is a `hidden beast` number, since 1 + 7 + 7 + 9 + 8 + 4 + 9 + 332 + 289 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1484547296400 + 295302035889 = 1218420^2 + 543417^2 .

It is not a de Polignac number, because 1779849332289 - 2¹² = 1779849328193 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1779849332189) 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 17 ways as a sum of consecutive naturals, for example, 2017969324 + ... + 2017970205.

Almost surely, 2^{1779849332289} is an apocalyptic number.

It is an amenable number.

1779849332289 is a deficient number, since it is larger than the sum of its proper divisors (1210781859441).

1779849332289 is a wasteful number, since it uses less digits than its factorization.

1779849332289 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4035939549 (or 4035939539 counting only the distinct ones).

The product of its digits is 329204736, while the sum is 72.

The spelling of 1779849332289 in words is "one trillion, seven hundred seventy-nine billion, eight hundred forty-nine million, three hundred thirty-two thousand, two hundred eighty-nine".