53173004436 has 72 divisors (see below), whose sum is σ = 138101343744. Its totient is φ = 17237914560.

The previous prime is 53173004429. The next prime is 53173004453. The reversal of 53173004436 is 63440037135.

53173004436 is a `hidden beast` number, since 5 + 317 + 300 + 4 + 4 + 36 = 666.

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 53173004436.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3710461 + ... + 3724763.

Almost surely, 2^53173004436 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 53173004436, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (69050671872).

53173004436 is an abundant number, since it is smaller than the sum of its proper divisors (84928339308).

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

53173004436 is a wasteful number, since it uses less digits than its factorization.

53173004436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17141 (or 17136 counting only the distinct ones).

The product of its (nonzero) digits is 90720, while the sum is 36.

The spelling of 53173004436 in words is "fifty-three billion, one hundred seventy-three million, four thousand, four hundred thirty-six".