1265131832089 has 4 divisors (see below), whose sum is σ = 1265144995620. Its totient is φ = 1265118668560.

The previous prime is 1265131832087. The next prime is 1265131832093. The reversal of 1265131832089 is 9802381315621.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1148772388864 + 116359443225 = 1071808^2 + 341115^2 .

It is a cyclic number.

It is not a de Polignac number, because 1265131832089 - 2¹ = 1265131832087 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1265131832087) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6436534 + ... + 6630175.

It is an arithmetic number, because the mean of its divisors is an integer number (316286248905).

Almost surely, 2^{1265131832089} is an apocalyptic number.

It is an amenable number.

1265131832089 is a deficient number, since it is larger than the sum of its proper divisors (13163531).

1265131832089 is an equidigital number, since it uses as much as digits as its factorization.

1265131832089 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13163530.

The product of its (nonzero) digits is 622080, while the sum is 49.

The spelling of 1265131832089 in words is "one trillion, two hundred sixty-five billion, one hundred thirty-one million, eight hundred thirty-two thousand, eighty-nine".