53505665 has 8 divisors (see below), whose sum is σ = 64393920. Its totient is φ = 42679792.

The previous prime is 53505649. The next prime is 53505679. The reversal of 53505665 is 56650535.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 53505665 - 2⁴ = 53505649 is a prime.

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 7 ways as a sum of consecutive naturals, for example, 13685 + ... + 17154.

It is an arithmetic number, because the mean of its divisors is an integer number (8049240).

Almost surely, 2^53505665 is an apocalyptic number.

It is an amenable number.

53505665 is a deficient number, since it is larger than the sum of its proper divisors (10888255).

53505665 is a wasteful number, since it uses less digits than its factorization.

53505665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31191.

The product of its (nonzero) digits is 67500, while the sum is 35.

The square root of 53505665 is about 7314.7566603408. The cubic root of 53505665 is about 376.8194014296.

The spelling of 53505665 in words is "fifty-three million, five hundred five thousand, six hundred sixty-five".