78746863439 has 2 divisors, whose sum is σ = 78746863440. Its totient is φ = 78746863438.

The previous prime is 78746863427. The next prime is 78746863483. The reversal of 78746863439 is 93436864787.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 78746863439 - 2³⁶ = 10027386703 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78746863409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39373431719 + 39373431720.

It is an arithmetic number, because the mean of its divisors is an integer number (39373431720).

Almost surely, 2^78746863439 is an apocalyptic number.

78746863439 is a deficient number, since it is larger than the sum of its proper divisors (1).

78746863439 is an equidigital number, since it uses as much as digits as its factorization.

78746863439 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 146313216, while the sum is 65.

The spelling of 78746863439 in words is "seventy-eight billion, seven hundred forty-six million, eight hundred sixty-three thousand, four hundred thirty-nine".