77558605213 has 2 divisors, whose sum is σ = 77558605214. Its totient is φ = 77558605212.

The previous prime is 77558605193. The next prime is 77558605219. The reversal of 77558605213 is 31250685577.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 77438088729 + 120516484 = 278277^2 + 10978^2 .

It is an emirp because it is prime and its reverse (31250685577) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-77558605213 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (77558605219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38779302606 + 38779302607.

It is an arithmetic number, because the mean of its divisors is an integer number (38779302607).

Almost surely, 2^77558605213 is an apocalyptic number.

It is an amenable number.

77558605213 is a deficient number, since it is larger than the sum of its proper divisors (1).

77558605213 is an equidigital number, since it uses as much as digits as its factorization.

77558605213 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1764000, while the sum is 49.

The spelling of 77558605213 in words is "seventy-seven billion, five hundred fifty-eight million, six hundred five thousand, two hundred thirteen".