1368729185329 has 9 divisors (see below), whose sum is σ = 1504485068331. Its totient is φ = 1244287560120.

The previous prime is 1368729185311. The next prime is 1368729185353. The reversal of 1368729185329 is 9235819278631.

The square root of 1368729185329 is 1169927.

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

It can be written as a sum of positive squares in only one way, i.e., 1364562741025 + 4166444304 = 1168145^2 + 64548^2 .

It is not a de Polignac number, because 1368729185329 - 2⁹ = 1368729184817 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1368729189329) 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, 12816019 + ... + 12922375.

Almost surely, 2^{1368729185329} is an apocalyptic number.

1368729185329 is the 1169927-th square number.

1368729185329 is the 584964-th centered octagonal number.

It is an amenable number.

1368729185329 is a deficient number, since it is larger than the sum of its proper divisors (135755883002).

1368729185329 is an frugal number, since it uses more digits than its factorization.

1368729185329 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 212736 (or 106368 counting only the distinct ones).

The product of its digits is 39191040, while the sum is 64.

Multiplying 1368729185329 by its sum of digits (64), we get a square (87598667861056 = 9359416²).

The spelling of 1368729185329 in words is "one trillion, three hundred sixty-eight billion, seven hundred twenty-nine million, one hundred eighty-five thousand, three hundred twenty-nine".