65511543616 has 28 divisors (see below), whose sum is σ = 130115372992. Its totient is φ = 32726567808.

The previous prime is 65511543613. The next prime is 65511543623. The reversal of 65511543616 is 61634511556.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65511543613) 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, 383880 + ... + 527623.

Almost surely, 2^65511543616 is an apocalyptic number.

It is an amenable number.

65511543616 is a deficient number, since it is larger than the sum of its proper divisors (64603829376).

65511543616 is a wasteful number, since it uses less digits than its factorization.

65511543616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 912638 (or 912628 counting only the distinct ones).

The product of its digits is 324000, while the sum is 43.

The spelling of 65511543616 in words is "sixty-five billion, five hundred eleven million, five hundred forty-three thousand, six hundred sixteen".