53553636 has 60 divisors (see below), whose sum is σ = 142146928. Its totient is φ = 17577648.

The previous prime is 53553629. The next prime is 53553641. The reversal of 53553636 is 63635535.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 53553636.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 20475 + ... + 22941.

Almost surely, 2^53553636 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 53553636, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (71073464).

53553636 is an abundant number, since it is smaller than the sum of its proper divisors (88593292).

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

53553636 is a wasteful number, since it uses less digits than its factorization.

53553636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2550 (or 2539 counting only the distinct ones).

The product of its digits is 121500, while the sum is 36.

The square root of 53553636 is about 7318.0349821520. The cubic root of 53553636 is about 376.9319814340.

The spelling of 53553636 in words is "fifty-three million, five hundred fifty-three thousand, six hundred thirty-six".