67028445457 has 2 divisors, whose sum is σ = 67028445458. Its totient is φ = 67028445456.

The previous prime is 67028445409. The next prime is 67028445481. The reversal of 67028445457 is 75454482076.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 60317395216 + 6711050241 = 245596^2 + 81921^2 .

It is a cyclic number.

It is not a de Polignac number, because 67028445457 - 2²³ = 67020056849 is a prime.

It is not a weakly prime, because it can be changed into another prime (67028445557) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33514222728 + 33514222729.

It is an arithmetic number, because the mean of its divisors is an integer number (33514222729).

Almost surely, 2^67028445457 is an apocalyptic number.

It is an amenable number.

67028445457 is a deficient number, since it is larger than the sum of its proper divisors (1).

67028445457 is an equidigital number, since it uses as much as digits as its factorization.

67028445457 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7526400, while the sum is 52.

The spelling of 67028445457 in words is "sixty-seven billion, twenty-eight million, four hundred forty-five thousand, four hundred fifty-seven".