2605540523 has 2 divisors, whose sum is σ = 2605540524. Its totient is φ = 2605540522.

The previous prime is 2605540517. The next prime is 2605540543. The reversal of 2605540523 is 3250455062.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2605540523 - 2⁶ = 2605540459 is a prime.

It is a super-2 number, since 2×2605540523² = 13577682833990227058, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2605540523.

It is not a weakly prime, because it can be changed into another prime (2605540543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1302770261 + 1302770262.

It is an arithmetic number, because the mean of its divisors is an integer number (1302770262).

Almost surely, 2^2605540523 is an apocalyptic number.

2605540523 is a deficient number, since it is larger than the sum of its proper divisors (1).

2605540523 is an equidigital number, since it uses as much as digits as its factorization.

2605540523 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36000, while the sum is 32.

The square root of 2605540523 is about 51044.4955210648. The cubic root of 2605540523 is about 1376.0449177679.

Adding to 2605540523 its reverse (3250455062), we get a palindrome (5855995585).

The spelling of 2605540523 in words is "two billion, six hundred five million, five hundred forty thousand, five hundred twenty-three".