65564646555 has 16 divisors (see below), whose sum is σ = 111074225184. Its totient is φ = 32910881280.

The previous prime is 65564646551. The next prime is 65564646557. The reversal of 65564646555 is 55564646556.

It is a happy number.

It is not a de Polignac number, because 65564646555 - 2² = 65564646551 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 65564646495 and 65564646504.

It is not an unprimeable number, because it can be changed into a prime (65564646551) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 128557876 + ... + 128558385.

It is an arithmetic number, because the mean of its divisors is an integer number (6942139074).

Almost surely, 2^65564646555 is an apocalyptic number.

65564646555 is a deficient number, since it is larger than the sum of its proper divisors (45509578629).

65564646555 is a wasteful number, since it uses less digits than its factorization.

65564646555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 257116286.

The product of its digits is 64800000, while the sum is 57.

Subtracting from 65564646555 its reverse (55564646556), we obtain a palindrome (9999999999).

The spelling of 65564646555 in words is "sixty-five billion, five hundred sixty-four million, six hundred forty-six thousand, five hundred fifty-five".