65135601 has 12 divisors (see below), whose sum is σ = 94235700. Its totient is φ = 43354080.

The previous prime is 65135599. The next prime is 65135611. The reversal of 65135601 is 10653156.

It is a happy number.

65135601 is a `hidden beast` number, since 6 + 51 + 3 + 5 + 601 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 24800400 + 40335201 = 4980^2 + 6351^2 .

It is not a de Polignac number, because 65135601 - 2¹ = 65135599 is a prime.

It is a Curzon number.

It is a congruent number.

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

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 475 + ... + 11423.

It is an arithmetic number, because the mean of its divisors is an integer number (7852975).

Almost surely, 2^65135601 is an apocalyptic number.

It is an amenable number.

65135601 is a deficient number, since it is larger than the sum of its proper divisors (29100099).

65135601 is a wasteful number, since it uses less digits than its factorization.

65135601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11616 (or 11613 counting only the distinct ones).

The product of its (nonzero) digits is 2700, while the sum is 27.

The square root of 65135601 is about 8070.6629839190. The cubic root of 65135601 is about 402.3519788004.

Adding to 65135601 its reverse (10653156), we get a palindrome (75788757).

The spelling of 65135601 in words is "sixty-five million, one hundred thirty-five thousand, six hundred one".