53665636 has 12 divisors (see below), whose sum is σ = 94793328. Its totient is φ = 26581832.

The previous prime is 53665613. The next prime is 53665637. The reversal of 53665636 is 63656635.

It is not an unprimeable number, because it can be changed into a prime (53665637) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 62266 + ... + 63121.

It is an arithmetic number, because the mean of its divisors is an integer number (7899444).

Almost surely, 2^53665636 is an apocalyptic number.

It is an amenable number.

53665636 is a deficient number, since it is larger than the sum of its proper divisors (41127692).

53665636 is a wasteful number, since it uses less digits than its factorization.

53665636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125498 (or 125496 counting only the distinct ones).

The product of its digits is 291600, while the sum is 40.

The square root of 53665636 is about 7325.6833128385. The cubic root of 53665636 is about 377.1945654483.

Subtracting 53665636 from its reverse (63656635), we obtain a palindrome (9990999).

The spelling of 53665636 in words is "fifty-three million, six hundred sixty-five thousand, six hundred thirty-six".