78829865407 has 2 divisors, whose sum is σ = 78829865408. Its totient is φ = 78829865406.

The previous prime is 78829865341. The next prime is 78829865437. The reversal of 78829865407 is 70456892887.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-78829865407 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78829865437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39414932703 + 39414932704.

It is an arithmetic number, because the mean of its divisors is an integer number (39414932704).

Almost surely, 2^78829865407 is an apocalyptic number.

78829865407 is a deficient number, since it is larger than the sum of its proper divisors (1).

78829865407 is an equidigital number, since it uses as much as digits as its factorization.

78829865407 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 54190080, while the sum is 64.

The spelling of 78829865407 in words is "seventy-eight billion, eight hundred twenty-nine million, eight hundred sixty-five thousand, four hundred seven".