77860852068191 has 2 divisors, whose sum is σ = 77860852068192. Its totient is φ = 77860852068190.

The previous prime is 77860852068161. The next prime is 77860852068221. The reversal of 77860852068191 is 19186025806877.

It is a balanced prime because it is at equal distance from previous prime (77860852068161) and next prime (77860852068221).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-77860852068191 is a prime.

It is a super-2 number, since 2×77860852068191² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (77860852068121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38930426034095 + 38930426034096.

It is an arithmetic number, because the mean of its divisors is an integer number (38930426034096).

Almost surely, 2^{77860852068191} is an apocalyptic number.

77860852068191 is a deficient number, since it is larger than the sum of its proper divisors (1).

77860852068191 is an equidigital number, since it uses as much as digits as its factorization.

77860852068191 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 81285120, while the sum is 68.

The spelling of 77860852068191 in words is "seventy-seven trillion, eight hundred sixty billion, eight hundred fifty-two million, sixty-eight thousand, one hundred ninety-one".