53553640 has 64 divisors (see below), whose sum is σ = 138562560. Its totient is φ = 18247680.

The previous prime is 53553629. The next prime is 53553641. The reversal of 53553640 is 4635535.

It is not an unprimeable number, because it can be changed into a prime (53553641) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 53545 + ... + 54535.

It is an arithmetic number, because the mean of its divisors is an integer number (2165040).

Almost surely, 2^53553640 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 53553640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (69281280).

53553640 is an abundant number, since it is smaller than the sum of its proper divisors (85008920).

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

53553640 is a wasteful number, since it uses less digits than its factorization.

53553640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1202 (or 1198 counting only the distinct ones).

The product of its (nonzero) digits is 27000, while the sum is 31.

The square root of 53553640 is about 7318.0352554494. The cubic root of 53553640 is about 376.9319908186.

The spelling of 53553640 in words is "fifty-three million, five hundred fifty-three thousand, six hundred forty".