2565455264417 has 4 divisors (see below), whose sum is σ = 2716364397636. Its totient is φ = 2414546131200.

The previous prime is 2565455264381. The next prime is 2565455264443. The reversal of 2565455264417 is 7144625545652.

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 910833549376 + 1654621715041 = 954376^2 + 1286321^2 .

It is a cyclic number.

It is not a de Polignac number, because 2565455264417 - 2¹⁸ = 2565455002273 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2565455264117) 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, 75454566584 + ... + 75454566617.

It is an arithmetic number, because the mean of its divisors is an integer number (679091099409).

Almost surely, 2^{2565455264417} is an apocalyptic number.

It is an amenable number.

2565455264417 is a deficient number, since it is larger than the sum of its proper divisors (150909133219).

2565455264417 is a wasteful number, since it uses less digits than its factorization.

2565455264417 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 150909133218.

The product of its digits is 40320000, while the sum is 56.

The spelling of 2565455264417 in words is "two trillion, five hundred sixty-five billion, four hundred fifty-five million, two hundred sixty-four thousand, four hundred seventeen".