65145636 has 18 divisors (see below), whose sum is σ = 164673782. Its totient is φ = 21715200.

The previous prime is 65145611. The next prime is 65145671. The reversal of 65145636 is 63654156.

65145636 is a `hidden beast` number, since 6 + 5 + 14 + 5 + 636 = 666.

It can be written as a sum of positive squares in only one way, i.e., 65124900 + 20736 = 8070^2 + 144^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 1809601 = 65145636 / (6 + 5 + 1 + 4 + 5 + 6 + 3 + 6).

It is a self number, because there is not a number n which added to its sum of digits gives 65145636.

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 in 5 ways as a sum of consecutive naturals, for example, 904765 + ... + 904836.

Almost surely, 2^65145636 is an apocalyptic number.

It is an amenable number.

65145636 is an abundant number, since it is smaller than the sum of its proper divisors (99528146).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

65145636 is a wasteful number, since it uses less digits than its factorization.

65145636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1809611 (or 1809606 counting only the distinct ones).

The product of its digits is 64800, while the sum is 36.

The square root of 65145636 is about 8071.2846561127. The cubic root of 65145636 is about 402.3726402856.

The spelling of 65145636 in words is "sixty-five million, one hundred forty-five thousand, six hundred thirty-six".