5268721669 has 2 divisors, whose sum is σ = 5268721670. Its totient is φ = 5268721668.

The previous prime is 5268721663. The next prime is 5268721681. The reversal of 5268721669 is 9661278625.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4178071044 + 1090650625 = 64638^2 + 33025^2 .

It is a cyclic number.

It is not a de Polignac number, because 5268721669 - 2⁷ = 5268721541 is a prime.

It is a super-2 number, since 2×5268721669² = 55518856050780291122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5268721663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2634360834 + 2634360835.

It is an arithmetic number, because the mean of its divisors is an integer number (2634360835).

Almost surely, 2^5268721669 is an apocalyptic number.

It is an amenable number.

5268721669 is a deficient number, since it is larger than the sum of its proper divisors (1).

5268721669 is an equidigital number, since it uses as much as digits as its factorization.

5268721669 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2177280, while the sum is 52.

The square root of 5268721669 is about 72585.9605502331. The cubic root of 5268721669 is about 1740.0768087158.

The spelling of 5268721669 in words is "five billion, two hundred sixty-eight million, seven hundred twenty-one thousand, six hundred sixty-nine".