78122611339 has 2 divisors, whose sum is σ = 78122611340. Its totient is φ = 78122611338.

The previous prime is 78122611313. The next prime is 78122611349. The reversal of 78122611339 is 93311622187.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 78122611339 - 2⁹ = 78122610827 is a prime.

It is a super-2 number, since 2×78122611339² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 78122611295 and 78122611304.

It is not a weakly prime, because it can be changed into another prime (78122611349) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39061305669 + 39061305670.

It is an arithmetic number, because the mean of its divisors is an integer number (39061305670).

Almost surely, 2^78122611339 is an apocalyptic number.

78122611339 is a deficient number, since it is larger than the sum of its proper divisors (1).

78122611339 is an equidigital number, since it uses as much as digits as its factorization.

78122611339 is an evil number, because the sum of its binary digits is even.

The product of its digits is 108864, while the sum is 43.

The spelling of 78122611339 in words is "seventy-eight billion, one hundred twenty-two million, six hundred eleven thousand, three hundred thirty-nine".