53165680 has 20 divisors (see below), whose sum is σ = 123610392. Its totient is φ = 21266240.

The previous prime is 53165677. The next prime is 53165689. The reversal of 53165680 is 8656135.

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53165689) 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, 332206 + ... + 332365.

Almost surely, 2^53165680 is an apocalyptic number.

It is an amenable number.

53165680 is an abundant number, since it is smaller than the sum of its proper divisors (70444712).

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

53165680 is a wasteful number, since it uses less digits than its factorization.

53165680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 664584 (or 664578 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 34.

The square root of 53165680 is about 7291.4799595144. The cubic root of 53165680 is about 376.0195779756.

The spelling of 53165680 in words is "fifty-three million, one hundred sixty-five thousand, six hundred eighty".