65564516649 has 8 divisors (see below), whose sum is σ = 87497204512. Its totient is φ = 43670753280.

The previous prime is 65564516597. The next prime is 65564516701. The reversal of 65564516649 is 94661546556.

65564516649 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (65564516597) and next prime (65564516701).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 65564516649 - 2⁹ = 65564516137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65564516249) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9727192 + ... + 9733929.

It is an arithmetic number, because the mean of its divisors is an integer number (10937150564).

Almost surely, 2^65564516649 is an apocalyptic number.

It is an amenable number.

65564516649 is a deficient number, since it is larger than the sum of its proper divisors (21932687863).

65564516649 is a wasteful number, since it uses less digits than its factorization.

65564516649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19462247.

The product of its digits is 23328000, while the sum is 57.

The spelling of 65564516649 in words is "sixty-five billion, five hundred sixty-four million, five hundred sixteen thousand, six hundred forty-nine".