65511340565 has 32 divisors (see below), whose sum is σ = 90411745536. Its totient is φ = 45103196160.

The previous prime is 65511340553. The next prime is 65511340571. The reversal of 65511340565 is 56504311556.

65511340565 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 65511340565 - 2⁸ = 65511340309 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 144242 + ... + 389651.

It is an arithmetic number, because the mean of its divisors is an integer number (2825367048).

Almost surely, 2^65511340565 is an apocalyptic number.

It is an amenable number.

65511340565 is a deficient number, since it is larger than the sum of its proper divisors (24900404971).

65511340565 is a wasteful number, since it uses less digits than its factorization.

65511340565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 534029.

The product of its (nonzero) digits is 270000, while the sum is 41.

The spelling of 65511340565 in words is "sixty-five billion, five hundred eleven million, three hundred forty thousand, five hundred sixty-five".