53564643 has 36 divisors (see below), whose sum is σ = 86062704. Its totient is φ = 32076000.

The previous prime is 53564639. The next prime is 53564647. The reversal of 53564643 is 34646535.

53564643 is a `hidden beast` number, since 5 + 3 + 5 + 6 + 4 + 643 = 666.

53564643 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (53564639) and next prime (53564647).

It is not a de Polignac number, because 53564643 - 2² = 53564639 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 53564598 and 53564607.

It is not an unprimeable number, because it can be changed into a prime (53564647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 109746 + ... + 110232.

Almost surely, 2^53564643 is an apocalyptic number.

53564643 is a deficient number, since it is larger than the sum of its proper divisors (32498061).

53564643 is a wasteful number, since it uses less digits than its factorization.

53564643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 616 (or 602 counting only the distinct ones).

The product of its digits is 129600, while the sum is 36.

The square root of 53564643 is about 7318.7869896589. The cubic root of 53564643 is about 376.9578035594.

It can be divided in two parts, 5356 and 4643, that added together give a palindrome (9999).

The spelling of 53564643 in words is "fifty-three million, five hundred sixty-four thousand, six hundred forty-three".