2665254138529 has 4 divisors (see below), whose sum is σ = 2665259212420. Its totient is φ = 2665249064640.

The previous prime is 2665254138527. The next prime is 2665254138697. The reversal of 2665254138529 is 9258314525662.

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 959743512225 + 1705510626304 = 979665^2 + 1305952^2 .

It is a cyclic number.

It is not a de Polignac number, because 2665254138529 - 2¹ = 2665254138527 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2665254138527) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1644324 + ... + 2834485.

It is an arithmetic number, because the mean of its divisors is an integer number (666314803105).

Almost surely, 2^{2665254138529} is an apocalyptic number.

It is an amenable number.

2665254138529 is a deficient number, since it is larger than the sum of its proper divisors (5073891).

2665254138529 is an equidigital number, since it uses as much as digits as its factorization.

2665254138529 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5073890.

The product of its digits is 31104000, while the sum is 58.

The spelling of 2665254138529 in words is "two trillion, six hundred sixty-five billion, two hundred fifty-four million, one hundred thirty-eight thousand, five hundred twenty-nine".