67216061249 has 2 divisors, whose sum is σ = 67216061250. Its totient is φ = 67216061248.

The previous prime is 67216061221. The next prime is 67216061279. The reversal of 67216061249 is 94216061276.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 67008499600 + 207561649 = 258860^2 + 14407^2 .

It is a cyclic number.

It is not a de Polignac number, because 67216061249 - 2²⁸ = 66947625793 is a prime.

It is not a weakly prime, because it can be changed into another prime (67216061219) 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, 33608030624 + 33608030625.

It is an arithmetic number, because the mean of its divisors is an integer number (33608030625).

Almost surely, 2^67216061249 is an apocalyptic number.

It is an amenable number.

67216061249 is a deficient number, since it is larger than the sum of its proper divisors (1).

67216061249 is an equidigital number, since it uses as much as digits as its factorization.

67216061249 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 217728, while the sum is 44.

The spelling of 67216061249 in words is "sixty-seven billion, two hundred sixteen million, sixty-one thousand, two hundred forty-nine".