65523563 has 4 divisors (see below), whose sum is σ = 74884080. Its totient is φ = 56163048.

The previous prime is 65523551. The next prime is 65523569. The reversal of 65523563 is 36532556.

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 65523563 - 2⁴ = 65523547 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65523569) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4680248 + ... + 4680261.

It is an arithmetic number, because the mean of its divisors is an integer number (18721020).

Almost surely, 2^65523563 is an apocalyptic number.

65523563 is a deficient number, since it is larger than the sum of its proper divisors (9360517).

65523563 is an equidigital number, since it uses as much as digits as its factorization.

65523563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9360516.

The product of its digits is 81000, while the sum is 35.

The square root of 65523563 is about 8094.6626242234. The cubic root of 65523563 is about 403.1492303846.

The spelling of 65523563 in words is "sixty-five million, five hundred twenty-three thousand, five hundred sixty-three".