67734078751609 has 2 divisors, whose sum is σ = 67734078751610. Its totient is φ = 67734078751608.

The previous prime is 67734078751477. The next prime is 67734078751621. The reversal of 67734078751609 is 90615787043776.

It is a happy number.

67734078751609 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 47504350675600 + 20229728076009 = 6892340^2 + 4497747^2 .

It is a cyclic number.

It is not a de Polignac number, because 67734078751609 - 2³³ = 67725488817017 is a prime.

It is not a weakly prime, because it can be changed into another prime (67734078751649) 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, 33867039375804 + 33867039375805.

It is an arithmetic number, because the mean of its divisors is an integer number (33867039375805).

Almost surely, 2^{67734078751609} is an apocalyptic number.

It is an amenable number.

67734078751609 is a deficient number, since it is larger than the sum of its proper divisors (1).

67734078751609 is an equidigital number, since it uses as much as digits as its factorization.

67734078751609 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 373403520, while the sum is 70.

The spelling of 67734078751609 in words is "sixty-seven trillion, seven hundred thirty-four billion, seventy-eight million, seven hundred fifty-one thousand, six hundred nine".