65135811 has 12 divisors (see below), whose sum is σ = 94042968. Its totient is φ = 40083264.

The previous prime is 65135803. The next prime is 65135821. The reversal of 65135811 is 11853156.

It is not a de Polignac number, because 65135811 - 2³ = 65135803 is a prime.

It is not an unprimeable number, because it can be changed into a prime (65135801) 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, 63730 + ... + 64743.

It is an arithmetic number, because the mean of its divisors is an integer number (7836914).

Almost surely, 2^65135811 is an apocalyptic number.

65135811 is a deficient number, since it is larger than the sum of its proper divisors (28907157).

65135811 is a wasteful number, since it uses less digits than its factorization.

65135811 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128502 (or 128489 counting only the distinct ones).

The product of its digits is 3600, while the sum is 30.

The square root of 65135811 is about 8070.6759939921. The cubic root of 65135811 is about 402.3524112000.

Adding to 65135811 its reverse (11853156), we get a palindrome (76988967).

The spelling of 65135811 in words is "sixty-five million, one hundred thirty-five thousand, eight hundred eleven".