5268721613 has 2 divisors, whose sum is σ = 5268721614. Its totient is φ = 5268721612.

The previous prime is 5268721561. The next prime is 5268721643. The reversal of 5268721613 is 3161278625.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4875809929 + 392911684 = 69827^2 + 19822^2 .

It is a cyclic number.

It is not a de Polignac number, because 5268721613 - 2²⁸ = 5000286157 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5268721643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2634360806 + 2634360807.

It is an arithmetic number, because the mean of its divisors is an integer number (2634360807).

Almost surely, 2^5268721613 is an apocalyptic number.

It is an amenable number.

5268721613 is a deficient number, since it is larger than the sum of its proper divisors (1).

5268721613 is an equidigital number, since it uses as much as digits as its factorization.

5268721613 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 120960, while the sum is 41.

The square root of 5268721613 is about 72585.9601644836. The cubic root of 5268721613 is about 1740.0768025508.

The spelling of 5268721613 in words is "five billion, two hundred sixty-eight million, seven hundred twenty-one thousand, six hundred thirteen".