78567434717773 has 2 divisors, whose sum is σ = 78567434717774. Its totient is φ = 78567434717772.

The previous prime is 78567434717771. The next prime is 78567434717797. The reversal of 78567434717773 is 37771743476587.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 78539350991049 + 28083726724 = 8862243^2 + 167582^2 .

It is a cyclic number.

It is not a de Polignac number, because 78567434717773 - 2¹ = 78567434717771 is a prime.

Together with 78567434717771, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 78567434717773.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78567434717771) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39283717358886 + 39283717358887.

It is an arithmetic number, because the mean of its divisors is an integer number (39283717358887).

Almost surely, 2^{78567434717773} is an apocalyptic number.

It is an amenable number.

78567434717773 is a deficient number, since it is larger than the sum of its proper divisors (1).

78567434717773 is an equidigital number, since it uses as much as digits as its factorization.

78567434717773 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4065949440, while the sum is 76.

The spelling of 78567434717773 in words is "seventy-eight trillion, five hundred sixty-seven billion, four hundred thirty-four million, seven hundred seventeen thousand, seven hundred seventy-three".