67943215057 has 2 divisors, whose sum is σ = 67943215058. Its totient is φ = 67943215056.

The previous prime is 67943215037. The next prime is 67943215073. The reversal of 67943215057 is 75051234976.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 57523705281 + 10419509776 = 239841^2 + 102076^2 .

It is a cyclic number.

It is not a de Polignac number, because 67943215057 - 2¹⁵ = 67943182289 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 67943215057.

It is not a weakly prime, because it can be changed into another prime (67943215027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33971607528 + 33971607529.

It is an arithmetic number, because the mean of its divisors is an integer number (33971607529).

Almost surely, 2^67943215057 is an apocalyptic number.

It is an amenable number.

67943215057 is a deficient number, since it is larger than the sum of its proper divisors (1).

67943215057 is an equidigital number, since it uses as much as digits as its factorization.

67943215057 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1587600, while the sum is 49.

The spelling of 67943215057 in words is "sixty-seven billion, nine hundred forty-three million, two hundred fifteen thousand, fifty-seven".