65320120633541 has 4 divisors (see below), whose sum is σ = 65322231783084. Its totient is φ = 65318009484000.

The previous prime is 65320120633501. The next prime is 65320120633561. The reversal of 65320120633541 is 14533602102356.

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 44665777096516 + 20654343537025 = 6683246^2 + 4544705^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-65320120633541 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65320120633501) 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, 1055528360 + ... + 1055590241.

It is an arithmetic number, because the mean of its divisors is an integer number (16330557945771).

Almost surely, 2^{65320120633541} is an apocalyptic number.

It is an amenable number.

65320120633541 is a deficient number, since it is larger than the sum of its proper divisors (2111149543).

65320120633541 is a wasteful number, since it uses less digits than its factorization.

65320120633541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2111149542.

The product of its (nonzero) digits is 388800, while the sum is 41.

Adding to 65320120633541 its reverse (14533602102356), we get a palindrome (79853722735897).

The spelling of 65320120633541 in words is "sixty-five trillion, three hundred twenty billion, one hundred twenty million, six hundred thirty-three thousand, five hundred forty-one".