1729853349121 has 2 divisors, whose sum is σ = 1729853349122. Its totient is φ = 1729853349120.

The previous prime is 1729853349083. The next prime is 1729853349131. The reversal of 1729853349121 is 1219433589271.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1518378450625 + 211474898496 = 1232225^2 + 459864^2 .

It is a cyclic number.

It is not a de Polignac number, because 1729853349121 - 2¹¹ = 1729853347073 is a prime.

It is a super-2 number, since 2×1729853349121² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1729853349131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 864926674560 + 864926674561.

It is an arithmetic number, because the mean of its divisors is an integer number (864926674561).

Almost surely, 2^{1729853349121} is an apocalyptic number.

It is an amenable number.

1729853349121 is a deficient number, since it is larger than the sum of its proper divisors (1).

1729853349121 is an equidigital number, since it uses as much as digits as its factorization.

1729853349121 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3265920, while the sum is 55.

The spelling of 1729853349121 in words is "one trillion, seven hundred twenty-nine billion, eight hundred fifty-three million, three hundred forty-nine thousand, one hundred twenty-one".