53161644 has 12 divisors (see below), whose sum is σ = 124043864. Its totient is φ = 17720544.

The previous prime is 53161643. The next prime is 53161649. The reversal of 53161644 is 44616135.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (53161643) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2215057 + ... + 2215080.

Almost surely, 2^53161644 is an apocalyptic number.

It is an amenable number.

53161644 is an abundant number, since it is smaller than the sum of its proper divisors (70882220).

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

53161644 is a wasteful number, since it uses less digits than its factorization.

53161644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4430144 (or 4430142 counting only the distinct ones).

The product of its digits is 8640, while the sum is 30.

The square root of 53161644 is about 7291.2031928894. The cubic root of 53161644 is about 376.0100627305.

Adding to 53161644 its reverse (44616135), we get a palindrome (97777779).

The spelling of 53161644 in words is "fifty-three million, one hundred sixty-one thousand, six hundred forty-four".