67448636869 has 2 divisors, whose sum is σ = 67448636870. Its totient is φ = 67448636868.

The previous prime is 67448636819. The next prime is 67448636881. The reversal of 67448636869 is 96863684476.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 44031986244 + 23416650625 = 209838^2 + 153025^2 .

It is a cyclic number.

It is not a de Polignac number, because 67448636869 - 2⁹ = 67448636357 is a prime.

It is a super-2 number, since 2×67448636869² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (67448636819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33724318434 + 33724318435.

It is an arithmetic number, because the mean of its divisors is an integer number (33724318435).

Almost surely, 2^67448636869 is an apocalyptic number.

It is an amenable number.

67448636869 is a deficient number, since it is larger than the sum of its proper divisors (1).

67448636869 is an equidigital number, since it uses as much as digits as its factorization.

67448636869 is an evil number, because the sum of its binary digits is even.

The product of its digits is 250822656, while the sum is 67.

The spelling of 67448636869 in words is "sixty-seven billion, four hundred forty-eight million, six hundred thirty-six thousand, eight hundred sixty-nine".