53505756 has 18 divisors (see below), whose sum is σ = 135250752. Its totient is φ = 17835240.

The previous prime is 53505733. The next prime is 53505799. The reversal of 53505756 is 65750535.

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 1486271 = 53505756 / (5 + 3 + 5 + 0 + 5 + 7 + 5 + 6).

It is a self number, because there is not a number n which added to its sum of digits gives 53505756.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 743100 + ... + 743171.

Almost surely, 2^53505756 is an apocalyptic number.

It is an amenable number.

53505756 is an abundant number, since it is smaller than the sum of its proper divisors (81744996).

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

53505756 is a wasteful number, since it uses less digits than its factorization.

53505756 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1486281 (or 1486276 counting only the distinct ones).

The product of its (nonzero) digits is 78750, while the sum is 36.

The square root of 53505756 is about 7314.7628806408. The cubic root of 53505756 is about 376.8196150553.

The spelling of 53505756 in words is "fifty-three million, five hundred five thousand, seven hundred fifty-six".