2565131334545 has 8 divisors (see below), whose sum is σ = 3314938955496. Its totient is φ = 1894250831616.

The previous prime is 2565131334487. The next prime is 2565131334587. The reversal of 2565131334545 is 5454331315652.

It can be written as a sum of positive squares in 4 ways, for example, as 69464400721 + 2495666933824 = 263561^2 + 1579768^2 .

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

It is not a de Polignac number, because 2565131334545 - 2¹⁴ = 2565131318161 is a prime.

It is a super-2 number, since 2×2565131334545² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2565131334545.

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, 19731779432 + ... + 19731779561.

It is an arithmetic number, because the mean of its divisors is an integer number (414367369437).

Almost surely, 2^{2565131334545} is an apocalyptic number.

It is an amenable number.

2565131334545 is a deficient number, since it is larger than the sum of its proper divisors (749807620951).

2565131334545 is a wasteful number, since it uses less digits than its factorization.

2565131334545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39463559011.

The product of its digits is 3240000, while the sum is 47.

The spelling of 2565131334545 in words is "two trillion, five hundred sixty-five billion, one hundred thirty-one million, three hundred thirty-four thousand, five hundred forty-five".