53065640 has 16 divisors (see below), whose sum is σ = 119397780. Its totient is φ = 21226240.

The previous prime is 53065633. The next prime is 53065657. The reversal of 53065640 is 4656035.

It can be written as a sum of positive squares in 2 ways, for example, as 51868804 + 1196836 = 7202^2 + 1094^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 663281 + ... + 663360.

Almost surely, 2^53065640 is an apocalyptic number.

It is an amenable number.

53065640 is an abundant number, since it is smaller than the sum of its proper divisors (66332140).

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

53065640 is a wasteful number, since it uses less digits than its factorization.

53065640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1326652 (or 1326648 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 29.

The square root of 53065640 is about 7284.6166680204. The cubic root of 53065640 is about 375.7835822639.

The spelling of 53065640 in words is "fifty-three million, sixty-five thousand, six hundred forty".