78228621186671 has 2 divisors, whose sum is σ = 78228621186672. Its totient is φ = 78228621186670.

The previous prime is 78228621186593. The next prime is 78228621186809. The reversal of 78228621186671 is 17668112682287.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 78228621186671 - 2³⁰ = 78227547444847 is a prime.

It is a super-2 number, since 2×78228621186671² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 78228621186598 and 78228621186607.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78228621156671) 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, 39114310593335 + 39114310593336.

It is an arithmetic number, because the mean of its divisors is an integer number (39114310593336).

Almost surely, 2^{78228621186671} is an apocalyptic number.

78228621186671 is a deficient number, since it is larger than the sum of its proper divisors (1).

78228621186671 is an equidigital number, since it uses as much as digits as its factorization.

78228621186671 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 43352064, while the sum is 65.

The spelling of 78228621186671 in words is "seventy-eight trillion, two hundred twenty-eight billion, six hundred twenty-one million, one hundred eighty-six thousand, six hundred seventy-one".