1329200365385 has 8 divisors (see below), whose sum is σ = 1609673837640. Its totient is φ = 1053604692864.

The previous prime is 1329200365321. The next prime is 1329200365393. The reversal of 1329200365385 is 5835630029231.

It can be written as a sum of positive squares in 4 ways, for example, as 1441948729 + 1327758416656 = 37973^2 + 1152284^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1329200365385 - 2⁶ = 1329200365321 is a prime.

It is a super-2 number, since 2×1329200365385² (a number of 25 digits) contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1219449332 + ... + 1219450421.

It is an arithmetic number, because the mean of its divisors is an integer number (201209229705).

Almost surely, 2^{1329200365385} is an apocalyptic number.

It is an amenable number.

1329200365385 is a deficient number, since it is larger than the sum of its proper divisors (280473472255).

1329200365385 is a wasteful number, since it uses less digits than its factorization.

1329200365385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2438899867.

The product of its (nonzero) digits is 1166400, while the sum is 47.

The spelling of 1329200365385 in words is "one trillion, three hundred twenty-nine billion, two hundred million, three hundred sixty-five thousand, three hundred eighty-five".