77485162717 has 2 divisors, whose sum is σ = 77485162718. Its totient is φ = 77485162716.

The previous prime is 77485162679. The next prime is 77485162739. The reversal of 77485162717 is 71726158477.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 43544838276 + 33940324441 = 208674^2 + 184229^2 .

It is a cyclic number.

It is not a de Polignac number, because 77485162717 - 2¹⁵ = 77485129949 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (77485169717) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38742581358 + 38742581359.

It is an arithmetic number, because the mean of its divisors is an integer number (38742581359).

Almost surely, 2^77485162717 is an apocalyptic number.

It is an amenable number.

77485162717 is a deficient number, since it is larger than the sum of its proper divisors (1).

77485162717 is an equidigital number, since it uses as much as digits as its factorization.

77485162717 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4609920, while the sum is 55.

The spelling of 77485162717 in words is "seventy-seven billion, four hundred eighty-five million, one hundred sixty-two thousand, seven hundred seventeen".