77617701773 has 2 divisors, whose sum is σ = 77617701774. Its totient is φ = 77617701772.

The previous prime is 77617701713. The next prime is 77617701793. The reversal of 77617701773 is 37710771677.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 76263240964 + 1354460809 = 276158^2 + 36803^2 .

It is a cyclic number.

It is not a de Polignac number, because 77617701773 - 2¹⁰ = 77617700749 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (77617701713) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38808850886 + 38808850887.

It is an arithmetic number, because the mean of its divisors is an integer number (38808850887).

Almost surely, 2^77617701773 is an apocalyptic number.

It is an amenable number.

77617701773 is a deficient number, since it is larger than the sum of its proper divisors (1).

77617701773 is an equidigital number, since it uses as much as digits as its factorization.

77617701773 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2117682, while the sum is 53.

The spelling of 77617701773 in words is "seventy-seven billion, six hundred seventeen million, seven hundred one thousand, seven hundred seventy-three".