78228458044643 has 2 divisors, whose sum is σ = 78228458044644. Its totient is φ = 78228458044642.

The previous prime is 78228458044621. The next prime is 78228458044703. The reversal of 78228458044643 is 34644085482287.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 78228458044643 - 2¹⁸ = 78228457782499 is a prime.

It is a super-3 number, since 3×78228458044643³ (a number of 43 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a self number, because there is not a number n which added to its sum of digits gives 78228458044643.

It is not a weakly prime, because it can be changed into another prime (78228458044343) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39114229022321 + 39114229022322.

It is an arithmetic number, because the mean of its divisors is an integer number (39114229022322).

Almost surely, 2^{78228458044643} is an apocalyptic number.

78228458044643 is a deficient number, since it is larger than the sum of its proper divisors (1).

78228458044643 is an equidigital number, since it uses as much as digits as its factorization.

78228458044643 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 330301440, while the sum is 65.

The spelling of 78228458044643 in words is "seventy-eight trillion, two hundred twenty-eight billion, four hundred fifty-eight million, forty-four thousand, six hundred forty-three".