78804550067 has 2 divisors, whose sum is σ = 78804550068. Its totient is φ = 78804550066.

The previous prime is 78804550063. The next prime is 78804550079. The reversal of 78804550067 is 76005540887.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 78804550067 - 2² = 78804550063 is a prime.

It is a super-2 number, since 2×78804550067² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 78804549997 and 78804550024.

It is not a weakly prime, because it can be changed into another prime (78804550061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39402275033 + 39402275034.

It is an arithmetic number, because the mean of its divisors is an integer number (39402275034).

Almost surely, 2^78804550067 is an apocalyptic number.

78804550067 is a deficient number, since it is larger than the sum of its proper divisors (1).

78804550067 is an equidigital number, since it uses as much as digits as its factorization.

78804550067 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1881600, while the sum is 50.

The spelling of 78804550067 in words is "seventy-eight billion, eight hundred four million, five hundred fifty thousand, sixty-seven".