52328216643 has 4 divisors (see below), whose sum is σ = 69770955528. Its totient is φ = 34885477760.

The previous prime is 52328216639. The next prime is 52328216657. The reversal of 52328216643 is 34661282325.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 52328216643 - 2² = 52328216639 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 52328216595 and 52328216604.

It is not an unprimeable number, because it can be changed into a prime (52328216663) 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, 8721369438 + ... + 8721369443.

It is an arithmetic number, because the mean of its divisors is an integer number (17442738882).

Almost surely, 2^52328216643 is an apocalyptic number.

52328216643 is a deficient number, since it is larger than the sum of its proper divisors (17442738885).

52328216643 is a wasteful number, since it uses less digits than its factorization.

52328216643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17442738884.

The product of its digits is 414720, while the sum is 42.

Adding to 52328216643 its reverse (34661282325), we get a palindrome (86989498968).

The spelling of 52328216643 in words is "fifty-two billion, three hundred twenty-eight million, two hundred sixteen thousand, six hundred forty-three".