1329734165881 has 9 divisors (see below), whose sum is σ = 1461622571269. Its totient is φ = 1208837710300.

The previous prime is 1329734165861. The next prime is 1329734165899. The reversal of 1329734165881 is 1885614379231.

The square root of 1329734165881 is 1153141.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 1329734165881 - 2¹¹ = 1329734163833 is a prime.

It is a super-2 number, since 2×1329734165881² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1329734165861) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 12632136 + ... + 12736966.

Almost surely, 2^{1329734165881} is an apocalyptic number.

1329734165881 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1329734165881 is the 1153141-st square number.

1329734165881 is the 576571-st centered octagonal number.

It is an amenable number.

1329734165881 is a deficient number, since it is larger than the sum of its proper divisors (131888405388).

1329734165881 is an frugal number, since it uses more digits than its factorization.

1329734165881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 209684 (or 104842 counting only the distinct ones).

The product of its digits is 8709120, while the sum is 58.

The spelling of 1329734165881 in words is "one trillion, three hundred twenty-nine billion, seven hundred thirty-four million, one hundred sixty-five thousand, eight hundred eighty-one".