78678968419 has 2 divisors, whose sum is σ = 78678968420. Its totient is φ = 78678968418.

The previous prime is 78678968371. The next prime is 78678968447. The reversal of 78678968419 is 91486987687.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-78678968419 is a prime.

It is a super-2 number, since 2×78678968419² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (78678968219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39339484209 + 39339484210.

It is an arithmetic number, because the mean of its divisors is an integer number (39339484210).

Almost surely, 2^78678968419 is an apocalyptic number.

78678968419 is a deficient number, since it is larger than the sum of its proper divisors (1).

78678968419 is an equidigital number, since it uses as much as digits as its factorization.

78678968419 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 292626432, while the sum is 73.

The spelling of 78678968419 in words is "seventy-eight billion, six hundred seventy-eight million, nine hundred sixty-eight thousand, four hundred nineteen".