65061105565 has 4 divisors (see below), whose sum is σ = 78073326684. Its totient is φ = 52048884448.

The previous prime is 65061105539. The next prime is 65061105611. The reversal of 65061105565 is 56550116056.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 19139615716 + 45921489849 = 138346^2 + 214293^2 .

It is a cyclic number.

It is not a de Polignac number, because 65061105565 - 2⁷ = 65061105437 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6506110552 + ... + 6506110561.

It is an arithmetic number, because the mean of its divisors is an integer number (19518331671).

Almost surely, 2^65061105565 is an apocalyptic number.

It is an amenable number.

65061105565 is a deficient number, since it is larger than the sum of its proper divisors (13012221119).

65061105565 is a wasteful number, since it uses less digits than its factorization.

65061105565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13012221118.

The product of its (nonzero) digits is 135000, while the sum is 40.

The spelling of 65061105565 in words is "sixty-five billion, sixty-one million, one hundred five thousand, five hundred sixty-five".