64623840171229 has 2 divisors, whose sum is σ = 64623840171230. Its totient is φ = 64623840171228.

The previous prime is 64623840171223. The next prime is 64623840171251. The reversal of 64623840171229 is 92217104832646.

64623840171229 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 43494051380004 + 21129788791225 = 6595002^2 + 4596715^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64623840171229 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 64623840171229.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64623840171223) 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, 32311920085614 + 32311920085615.

It is an arithmetic number, because the mean of its divisors is an integer number (32311920085615).

Almost surely, 2^{64623840171229} is an apocalyptic number.

It is an amenable number.

64623840171229 is a deficient number, since it is larger than the sum of its proper divisors (1).

64623840171229 is an equidigital number, since it uses as much as digits as its factorization.

64623840171229 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6967296, while the sum is 55.

The spelling of 64623840171229 in words is "sixty-four trillion, six hundred twenty-three billion, eight hundred forty million, one hundred seventy-one thousand, two hundred twenty-nine".