77968950383689 has 2 divisors, whose sum is σ = 77968950383690. Its totient is φ = 77968950383688.

The previous prime is 77968950383657. The next prime is 77968950383741. The reversal of 77968950383689 is 98638305986977.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 39854070008064 + 38114880375625 = 6313008^2 + 6173725^2 .

It is an emirp because it is prime and its reverse (98638305986977) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 77968950383689 - 2⁵ = 77968950383657 is a prime.

It is a super-3 number, since 3×77968950383689³ (a number of 43 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (77968950383189) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38984475191844 + 38984475191845.

It is an arithmetic number, because the mean of its divisors is an integer number (38984475191845).

Almost surely, 2^{77968950383689} is an apocalyptic number.

It is an amenable number.

77968950383689 is a deficient number, since it is larger than the sum of its proper divisors (1).

77968950383689 is an equidigital number, since it uses as much as digits as its factorization.

77968950383689 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 29628426240, while the sum is 88.

The spelling of 77968950383689 in words is "seventy-seven trillion, nine hundred sixty-eight billion, nine hundred fifty million, three hundred eighty-three thousand, six hundred eighty-nine".