67451408640029 has 2 divisors, whose sum is σ = 67451408640030. Its totient is φ = 67451408640028.

The previous prime is 67451408639977. The next prime is 67451408640059. The reversal of 67451408640029 is 92004680415476.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 43755182152900 + 23696226487129 = 6614770^2 + 4867877^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-67451408640029 is a prime.

It is a super-2 number, since 2×67451408640029² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (67451408640059) 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, 33725704320014 + 33725704320015.

It is an arithmetic number, because the mean of its divisors is an integer number (33725704320015).

Almost surely, 2^{67451408640029} is an apocalyptic number.

It is an amenable number.

67451408640029 is a deficient number, since it is larger than the sum of its proper divisors (1).

67451408640029 is an equidigital number, since it uses as much as digits as its factorization.

67451408640029 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11612160, while the sum is 56.

The spelling of 67451408640029 in words is "sixty-seven trillion, four hundred fifty-one billion, four hundred eight million, six hundred forty thousand, twenty-nine".