78539239411 has 2 divisors, whose sum is σ = 78539239412. Its totient is φ = 78539239410.

The previous prime is 78539239399. The next prime is 78539239417. The reversal of 78539239411 is 11493293587.

It is a strong prime.

It is an emirp because it is prime and its reverse (11493293587) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 78539239411 - 2⁷ = 78539239283 is a prime.

It is not a weakly prime, because it can be changed into another prime (78539239417) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39269619705 + 39269619706.

It is an arithmetic number, because the mean of its divisors is an integer number (39269619706).

Almost surely, 2^78539239411 is an apocalyptic number.

78539239411 is a deficient number, since it is larger than the sum of its proper divisors (1).

78539239411 is an equidigital number, since it uses as much as digits as its factorization.

78539239411 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1632960, while the sum is 52.

The spelling of 78539239411 in words is "seventy-eight billion, five hundred thirty-nine million, two hundred thirty-nine thousand, four hundred eleven".