78045030779 has 2 divisors, whose sum is σ = 78045030780. Its totient is φ = 78045030778.

The previous prime is 78045030733. The next prime is 78045030827. The reversal of 78045030779 is 97703054087.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-78045030779 is a prime.

It is not a weakly prime, because it can be changed into another prime (78045036779) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39022515389 + 39022515390.

It is an arithmetic number, because the mean of its divisors is an integer number (39022515390).

Almost surely, 2^78045030779 is an apocalyptic number.

78045030779 is a deficient number, since it is larger than the sum of its proper divisors (1).

78045030779 is an equidigital number, since it uses as much as digits as its factorization.

78045030779 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1481760, while the sum is 50.

The spelling of 78045030779 in words is "seventy-eight billion, forty-five million, thirty thousand, seven hundred seventy-nine".