53544571609 has 9 divisors (see below), whose sum is σ = 53941076413. Its totient is φ = 53150965312.

The previous prime is 53544571589. The next prime is 53544571651. The reversal of 53544571609 is 90617544535.

The square root of 53544571609 is 231397.

It is a perfect power (a square), and thus also a powerful number.

53544571609 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 32701297225 + 20843274384 = 180835^2 + 144372^2 .

It is not a de Polignac number, because 53544571609 - 2¹⁵ = 53544538841 is a prime.

It is a super-2 number, since 2×53544571609² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (53544571699) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 34477377 + ... + 34478929.

Almost surely, 2^53544571609 is an apocalyptic number.

53544571609 is the 231397-th square number.

53544571609 is the 115699-th centered octagonal number.

It is an amenable number.

53544571609 is a deficient number, since it is larger than the sum of its proper divisors (396504804).

53544571609 is an frugal number, since it uses more digits than its factorization.

53544571609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3404 (or 1702 counting only the distinct ones).

The product of its (nonzero) digits is 2268000, while the sum is 49.

Multiplying 53544571609 by its sum of digits (49), we get a square (2623684008841 = 1619779²).

The spelling of 53544571609 in words is "fifty-three billion, five hundred forty-four million, five hundred seventy-one thousand, six hundred nine".