77044454745773 has 2 divisors, whose sum is σ = 77044454745774. Its totient is φ = 77044454745772.

The previous prime is 77044454745757. The next prime is 77044454745799. The reversal of 77044454745773 is 37754745444077.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 73197572691364 + 3846882054409 = 8555558^2 + 1961347^2 .

It is a cyclic number.

It is not a de Polignac number, because 77044454745773 - 2⁴ = 77044454745757 is a prime.

It is a super-2 number, since 2×77044454745773² (a number of 29 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (77044454745703) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38522227372886 + 38522227372887.

It is an arithmetic number, because the mean of its divisors is an integer number (38522227372887).

Almost surely, 2^{77044454745773} is an apocalyptic number.

It is an amenable number.

77044454745773 is a deficient number, since it is larger than the sum of its proper divisors (1).

77044454745773 is an equidigital number, since it uses as much as digits as its factorization.

77044454745773 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1290777600, while the sum is 68.

The spelling of 77044454745773 in words is "seventy-seven trillion, forty-four billion, four hundred fifty-four million, seven hundred forty-five thousand, seven hundred seventy-three".