2565446742489 has 4 divisors (see below), whose sum is σ = 3420595656656. Its totient is φ = 1710297828324.

The previous prime is 2565446742479. The next prime is 2565446742499. The reversal of 2565446742489 is 9842476445652.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (2565446742479) and next prime (2565446742499).

It is not a de Polignac number, because 2565446742489 - 2⁴ = 2565446742473 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2565446742479) 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, 427574457079 + ... + 427574457084.

It is an arithmetic number, because the mean of its divisors is an integer number (855148914164).

Almost surely, 2^{2565446742489} is an apocalyptic number.

It is an amenable number.

2565446742489 is a deficient number, since it is larger than the sum of its proper divisors (855148914167).

2565446742489 is an equidigital number, since it uses as much as digits as its factorization.

2565446742489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 855148914166.

The product of its digits is 464486400, while the sum is 66.

The spelling of 2565446742489 in words is "two trillion, five hundred sixty-five billion, four hundred forty-six million, seven hundred forty-two thousand, four hundred eighty-nine".