1965808697329 has 9 divisors (see below), whose sum is σ = 1970538006297. Its totient is φ = 1961090721684.

The previous prime is 1965808697317. The next prime is 1965808697351. The reversal of 1965808697329 is 9237968085691.

The square root of 1965808697329 is 1402073.

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

It is not a de Polignac number, because 1965808697329 - 2¹³ = 1965808689137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1965808617329) 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, 682808112 + ... + 682810990.

Almost surely, 2^{1965808697329} is an apocalyptic number.

1965808697329 is the 1402073-rd square number.

1965808697329 is the 701037-th centered octagonal number.

It is an amenable number.

1965808697329 is a deficient number, since it is larger than the sum of its proper divisors (4729308968).

1965808697329 is an frugal number, since it uses more digits than its factorization.

1965808697329 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6732 (or 3366 counting only the distinct ones).

The product of its (nonzero) digits is 352719360, while the sum is 73.

The spelling of 1965808697329 in words is "one trillion, nine hundred sixty-five billion, eight hundred eight million, six hundred ninety-seven thousand, three hundred twenty-nine".