65601106050521 has 4 divisors (see below), whose sum is σ = 65623750549812. Its totient is φ = 65578461551232.

The previous prime is 65601106050509. The next prime is 65601106050619. The reversal of 65601106050521 is 12505060110656.

It is a happy number.

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 9054014802121 + 56547091248400 = 3008989^2 + 7519780^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-65601106050521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65601106055521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11322245300 + ... + 11322251093.

It is an arithmetic number, because the mean of its divisors is an integer number (16405937637453).

Almost surely, 2^{65601106050521} is an apocalyptic number.

It is an amenable number.

65601106050521 is a deficient number, since it is larger than the sum of its proper divisors (22644499291).

65601106050521 is a wasteful number, since it uses less digits than its factorization.

65601106050521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22644499290.

The product of its (nonzero) digits is 54000, while the sum is 38.

The spelling of 65601106050521 in words is "sixty-five trillion, six hundred one billion, one hundred six million, fifty thousand, five hundred twenty-one".