53443634436 has 42 divisors (see below), whose sum is σ = 140225401022. Its totient is φ = 17814543840.

The previous prime is 53443634429. The next prime is 53443634441. The reversal of 53443634436 is 63443634435.

53443634436 is a `hidden beast` number, since 5 + 3 + 4 + 4 + 3 + 634 + 4 + 3 + 6 = 666.

It can be written as a sum of positive squares in only one way, i.e., 50463129600 + 2980504836 = 224640^2 + 54594^2 .

It is a junction number, because it is equal to n+sod(n) for n = 53443634391 and 53443634400.

It is an unprimeable number.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 9160945 + ... + 9166776.

Almost surely, 2^53443634436 is an apocalyptic number.

It is an amenable number.

53443634436 is an abundant number, since it is smaller than the sum of its proper divisors (86781766586).

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

53443634436 is a wasteful number, since it uses less digits than its factorization.

53443634436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18327743 (or 18327726 counting only the distinct ones).

The product of its digits is 3732480, while the sum is 45.

Subtracting 53443634436 from its reverse (63443634435), we obtain a palindrome (9999999999).

The spelling of 53443634436 in words is "fifty-three billion, four hundred forty-three million, six hundred thirty-four thousand, four hundred thirty-six".