77555161207 has 2 divisors, whose sum is σ = 77555161208. Its totient is φ = 77555161206.

The previous prime is 77555161181. The next prime is 77555161223. The reversal of 77555161207 is 70216155577.

It is a strong prime.

It is an emirp because it is prime and its reverse (70216155577) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-77555161207 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (77555161007) 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, 38777580603 + 38777580604.

It is an arithmetic number, because the mean of its divisors is an integer number (38777580604).

Almost surely, 2^77555161207 is an apocalyptic number.

77555161207 is a deficient number, since it is larger than the sum of its proper divisors (1).

77555161207 is an equidigital number, since it uses as much as digits as its factorization.

77555161207 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 514500, while the sum is 46.

The spelling of 77555161207 in words is "seventy-seven billion, five hundred fifty-five million, one hundred sixty-one thousand, two hundred seven".