6520262168243 has 4 divisors (see below), whose sum is σ = 6598819543848. Its totient is φ = 6441704792640.

The previous prime is 6520262168209. The next prime is 6520262168257. The reversal of 6520262168243 is 3428612620256.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 6520262168243 - 2²⁰ = 6520261119667 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6520262168143) 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, 39278687678 + ... + 39278687843.

It is an arithmetic number, because the mean of its divisors is an integer number (1649704885962).

Almost surely, 2^{6520262168243} is an apocalyptic number.

6520262168243 is a deficient number, since it is larger than the sum of its proper divisors (78557375605).

6520262168243 is an equidigital number, since it uses as much as digits as its factorization.

6520262168243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78557375604.

The product of its (nonzero) digits is 1658880, while the sum is 47.

Adding to 6520262168243 its reverse (3428612620256), we get a palindrome (9948874788499).

The spelling of 6520262168243 in words is "six trillion, five hundred twenty billion, two hundred sixty-two million, one hundred sixty-eight thousand, two hundred forty-three".