67649516399 has 2 divisors, whose sum is σ = 67649516400. Its totient is φ = 67649516398.

The previous prime is 67649516387. The next prime is 67649516413. The reversal of 67649516399 is 99361594676.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-67649516399 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (67649516699) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33824758199 + 33824758200.

It is an arithmetic number, because the mean of its divisors is an integer number (33824758200).

Almost surely, 2^67649516399 is an apocalyptic number.

67649516399 is a deficient number, since it is larger than the sum of its proper divisors (1).

67649516399 is an equidigital number, since it uses as much as digits as its factorization.

67649516399 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 66134880, while the sum is 65.

The spelling of 67649516399 in words is "sixty-seven billion, six hundred forty-nine million, five hundred sixteen thousand, three hundred ninety-nine".