5268721609 has 4 divisors (see below), whose sum is σ = 5269298580. Its totient is φ = 5268144640.

The previous prime is 5268721561. The next prime is 5268721613. The reversal of 5268721609 is 9061278625.

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 2564409600 + 2704312009 = 50640^2 + 52003^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-5268721609 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5268721669) 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, 274564 + ... + 293125.

It is an arithmetic number, because the mean of its divisors is an integer number (1317324645).

Almost surely, 2^5268721609 is an apocalyptic number.

It is an amenable number.

5268721609 is a deficient number, since it is larger than the sum of its proper divisors (576971).

5268721609 is an equidigital number, since it uses as much as digits as its factorization.

5268721609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 576970.

The product of its (nonzero) digits is 362880, while the sum is 46.

The square root of 5268721609 is about 72585.9601369301. The cubic root of 5268721609 is about 1740.0768021105.

The spelling of 5268721609 in words is "five billion, two hundred sixty-eight million, seven hundred twenty-one thousand, six hundred nine".