78506653536679 has 2 divisors, whose sum is σ = 78506653536680. Its totient is φ = 78506653536678.

The previous prime is 78506653536629. The next prime is 78506653536691. The reversal of 78506653536679 is 97663535660587.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 78506653536679 - 2¹⁹ = 78506653012391 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78506653536629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39253326768339 + 39253326768340.

It is an arithmetic number, because the mean of its divisors is an integer number (39253326768340).

Almost surely, 2^{78506653536679} is an apocalyptic number.

78506653536679 is a deficient number, since it is larger than the sum of its proper divisors (1).

78506653536679 is an equidigital number, since it uses as much as digits as its factorization.

78506653536679 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5143824000, while the sum is 76.

The spelling of 78506653536679 in words is "seventy-eight trillion, five hundred six billion, six hundred fifty-three million, five hundred thirty-six thousand, six hundred seventy-nine".