65256533565257 has 4 divisors (see below), whose sum is σ = 67361583035136. Its totient is φ = 63151484095380.

The previous prime is 65256533565217. The next prime is 65256533565323. The reversal of 65256533565257 is 75256533565256.

65256533565257 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 65256533565257 - 2¹⁶ = 65256533499721 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 65256533565193 and 65256533565202.

It is not an unprimeable number, because it can be changed into a prime (65256533565217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1052524734893 + ... + 1052524734954.

It is an arithmetic number, because the mean of its divisors is an integer number (16840395758784).

Almost surely, 2^{65256533565257} is an apocalyptic number.

It is an amenable number.

65256533565257 is a deficient number, since it is larger than the sum of its proper divisors (2105049469879).

65256533565257 is a wasteful number, since it uses less digits than its factorization.

65256533565257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2105049469878.

The product of its digits is 850500000, while the sum is 65.

Subtracting 65256533565257 from its reverse (75256533565256), we obtain a palindrome (9999999999999).

The spelling of 65256533565257 in words is "sixty-five trillion, two hundred fifty-six billion, five hundred thirty-three million, five hundred sixty-five thousand, two hundred fifty-seven".