2554566565 has 8 divisors (see below), whose sum is σ = 3078637848. Its totient is φ = 2034881280.

The previous prime is 2554566559. The next prime is 2554566569. The reversal of 2554566565 is 5656654552.

It can be written as a sum of positive squares in 4 ways, for example, as 51165409 + 2503401156 = 7153^2 + 50034^2 .

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

It is not a de Polignac number, because 2554566565 - 2¹⁷ = 2554435493 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2554566569) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1095216 + ... + 1097545.

It is an arithmetic number, because the mean of its divisors is an integer number (384829731).

Almost surely, 2^2554566565 is an apocalyptic number.

It is an amenable number.

2554566565 is a deficient number, since it is larger than the sum of its proper divisors (524071283).

2554566565 is a wasteful number, since it uses less digits than its factorization.

2554566565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2192999.

The product of its digits is 5400000, while the sum is 49.

The square root of 2554566565 is about 50542.7201978683. The cubic root of 2554566565 is about 1367.0122548275.

The spelling of 2554566565 in words is "two billion, five hundred fifty-four million, five hundred sixty-six thousand, five hundred sixty-five".