79434420646783 has 2 divisors, whose sum is σ = 79434420646784. Its totient is φ = 79434420646782.

The previous prime is 79434420646753. The next prime is 79434420646811. The reversal of 79434420646783 is 38764602443497.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-79434420646783 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (79434420646753) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39717210323391 + 39717210323392.

It is an arithmetic number, because the mean of its divisors is an integer number (39717210323392).

Almost surely, 2^{79434420646783} is an apocalyptic number.

79434420646783 is a deficient number, since it is larger than the sum of its proper divisors (1).

79434420646783 is an equidigital number, since it uses as much as digits as its factorization.

79434420646783 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 585252864, while the sum is 67.

The spelling of 79434420646783 in words is "seventy-nine trillion, four hundred thirty-four billion, four hundred twenty million, six hundred forty-six thousand, seven hundred eighty-three".