2566361345 has 4 divisors (see below), whose sum is σ = 3079633620. Its totient is φ = 2053089072.

The previous prime is 2566361341. The next prime is 2566361359. The reversal of 2566361345 is 5431636652.

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 1688305921 + 878055424 = 41089^2 + 29632^2 .

It is a cyclic number.

It is not a de Polignac number, because 2566361345 - 2² = 2566361341 is a prime.

It is a super-2 number, since 2×2566361345² = 13172421106220418050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2566361341) 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, 256636130 + ... + 256636139.

It is an arithmetic number, because the mean of its divisors is an integer number (769908405).

Almost surely, 2^2566361345 is an apocalyptic number.

It is an amenable number.

2566361345 is a deficient number, since it is larger than the sum of its proper divisors (513272275).

2566361345 is an equidigital number, since it uses as much as digits as its factorization.

2566361345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 513272274.

The product of its digits is 388800, while the sum is 41.

The square root of 2566361345 is about 50659.2671186625. The cubic root of 2566361345 is about 1369.1129187286.

Adding to 2566361345 its reverse (5431636652), we get a palindrome (7997997997).

The spelling of 2566361345 in words is "two billion, five hundred sixty-six million, three hundred sixty-one thousand, three hundred forty-five".