78964446971 has 2 divisors, whose sum is σ = 78964446972. Its totient is φ = 78964446970.

The previous prime is 78964446949. The next prime is 78964447039. The reversal of 78964446971 is 17964446987.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-78964446971 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 78964446898 and 78964446907.

It is not a weakly prime, because it can be changed into another prime (78964446931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39482223485 + 39482223486.

It is an arithmetic number, because the mean of its divisors is an integer number (39482223486).

Almost surely, 2^78964446971 is an apocalyptic number.

78964446971 is a deficient number, since it is larger than the sum of its proper divisors (1).

78964446971 is an equidigital number, since it uses as much as digits as its factorization.

78964446971 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 73156608, while the sum is 65.

The spelling of 78964446971 in words is "seventy-eight billion, nine hundred sixty-four million, four hundred forty-six thousand, nine hundred seventy-one".