78164554163 has 2 divisors, whose sum is σ = 78164554164. Its totient is φ = 78164554162.

The previous prime is 78164554151. The next prime is 78164554207. The reversal of 78164554163 is 36145546187.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 78164554163 - 2¹⁰ = 78164553139 is a prime.

It is a super-2 number, since 2×78164554163² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (78164554103) 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, 39082277081 + 39082277082.

It is an arithmetic number, because the mean of its divisors is an integer number (39082277082).

Almost surely, 2^78164554163 is an apocalyptic number.

78164554163 is a deficient number, since it is larger than the sum of its proper divisors (1).

78164554163 is an equidigital number, since it uses as much as digits as its factorization.

78164554163 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2419200, while the sum is 50.

The spelling of 78164554163 in words is "seventy-eight billion, one hundred sixty-four million, five hundred fifty-four thousand, one hundred sixty-three".