52609821281 has 4 divisors (see below), whose sum is σ = 52687994052. Its totient is φ = 52531648512.

The previous prime is 52609821269. The next prime is 52609821287. The reversal of 52609821281 is 18212890625.

52609821281 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in 2 ways, for example, as 37914320656 + 14695500625 = 194716^2 + 121225^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-52609821281 is a prime.

It is a super-2 number, since 2×52609821281² (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 (52609821287) 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, 39085376 + ... + 39086721.

It is an arithmetic number, because the mean of its divisors is an integer number (13171998513).

Almost surely, 2^52609821281 is an apocalyptic number.

It is an amenable number.

52609821281 is a deficient number, since it is larger than the sum of its proper divisors (78172771).

52609821281 is an equidigital number, since it uses as much as digits as its factorization.

52609821281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78172770.

The product of its (nonzero) digits is 138240, while the sum is 44.

The spelling of 52609821281 in words is "fifty-two billion, six hundred nine million, eight hundred twenty-one thousand, two hundred eighty-one".