77504427126673 has 2 divisors, whose sum is σ = 77504427126674. Its totient is φ = 77504427126672.

The previous prime is 77504427126631. The next prime is 77504427126719. The reversal of 77504427126673 is 37662172440577.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 55771143488064 + 21733283638609 = 7468008^2 + 4661897^2 .

It is an emirp because it is prime and its reverse (37662172440577) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-77504427126673 is a prime.

It is not a weakly prime, because it can be changed into another prime (77504427126613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38752213563336 + 38752213563337.

It is an arithmetic number, because the mean of its divisors is an integer number (38752213563337).

Almost surely, 2^{77504427126673} is an apocalyptic number.

It is an amenable number.

77504427126673 is a deficient number, since it is larger than the sum of its proper divisors (1).

77504427126673 is an equidigital number, since it uses as much as digits as its factorization.

77504427126673 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 82978560, while the sum is 61.

The spelling of 77504427126673 in words is "seventy-seven trillion, five hundred four billion, four hundred twenty-seven million, one hundred twenty-six thousand, six hundred seventy-three".