1325805402389 has 6 divisors (see below), whose sum is σ = 1435635435906. Its totient is φ = 1223820371280.

The previous prime is 1325805402379. The next prime is 1325805402403. The reversal of 1325805402389 is 9832045085231.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 29470588900 + 1296334813489 = 171670^2 + 1138567^2 .

It is not a de Polignac number, because 1325805402389 - 2²⁸ = 1325536966933 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1325805402379) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3922501022 + ... + 3922501359.

It is an arithmetic number, because the mean of its divisors is an integer number (239272572651).

Almost surely, 2^{1325805402389} is an apocalyptic number.

It is an amenable number.

1325805402389 is a deficient number, since it is larger than the sum of its proper divisors (109830033517).

1325805402389 is an equidigital number, since it uses as much as digits as its factorization.

1325805402389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7845002407 (or 7845002394 counting only the distinct ones).

The product of its (nonzero) digits is 2073600, while the sum is 50.

The spelling of 1325805402389 in words is "one trillion, three hundred twenty-five billion, eight hundred five million, four hundred two thousand, three hundred eighty-nine".