78616686311 has 2 divisors, whose sum is σ = 78616686312. Its totient is φ = 78616686310.

The previous prime is 78616686307. The next prime is 78616686347. The reversal of 78616686311 is 11368661687.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 78616686311 - 2² = 78616686307 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78616686301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39308343155 + 39308343156.

It is an arithmetic number, because the mean of its divisors is an integer number (39308343156).

Almost surely, 2^78616686311 is an apocalyptic number.

78616686311 is a deficient number, since it is larger than the sum of its proper divisors (1).

78616686311 is an equidigital number, since it uses as much as digits as its factorization.

78616686311 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1741824, while the sum is 53.

The spelling of 78616686311 in words is "seventy-eight billion, six hundred sixteen million, six hundred eighty-six thousand, three hundred eleven".