65135872 has 18 divisors (see below), whose sum is σ = 130017818. Its totient is φ = 32567808.

The previous prime is 65135869. The next prime is 65135881. The reversal of 65135872 is 27853156.

It can be written as a sum of positive squares in only one way, i.e., 41165056 + 23970816 = 6416^2 + 4896^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 126963 + ... + 127474.

Almost surely, 2^65135872 is an apocalyptic number.

It is an amenable number.

65135872 is a deficient number, since it is larger than the sum of its proper divisors (64881946).

65135872 is an equidigital number, since it uses as much as digits as its factorization.

65135872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 254453 (or 254439 counting only the distinct ones).

The product of its digits is 50400, while the sum is 37.

The square root of 65135872 is about 8070.6797731046. The cubic root of 65135872 is about 402.3525368016.

The spelling of 65135872 in words is "sixty-five million, one hundred thirty-five thousand, eight hundred seventy-two".