65135641 has 4 divisors (see below), whose sum is σ = 65154484. Its totient is φ = 65116800.

The previous prime is 65135639. The next prime is 65135657. The reversal of 65135641 is 14653156.

65135641 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 6230016 + 58905625 = 2496^2 + 7675^2 .

It is a cyclic number.

It is not a de Polignac number, because 65135641 - 2¹ = 65135639 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65135611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2580 + ... + 11701.

It is an arithmetic number, because the mean of its divisors is an integer number (16288621).

Almost surely, 2^65135641 is an apocalyptic number.

It is an amenable number.

65135641 is a deficient number, since it is larger than the sum of its proper divisors (18843).

65135641 is a wasteful number, since it uses less digits than its factorization.

65135641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18842.

The product of its digits is 10800, while the sum is 31.

The square root of 65135641 is about 8070.6654620298. The cubic root of 65135641 is about 402.3520611623.

Adding to 65135641 its reverse (14653156), we get a palindrome (79788797).

The spelling of 65135641 in words is "sixty-five million, one hundred thirty-five thousand, six hundred forty-one".