77054544109 has 2 divisors, whose sum is σ = 77054544110. Its totient is φ = 77054544108.

The previous prime is 77054544089. The next prime is 77054544113. The reversal of 77054544109 is 90144545077.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 43713610084 + 33340934025 = 209078^2 + 182595^2 .

It is a cyclic number.

It is not a de Polignac number, because 77054544109 - 2¹⁹ = 77054019821 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (77054544169) 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, 38527272054 + 38527272055.

It is an arithmetic number, because the mean of its divisors is an integer number (38527272055).

Almost surely, 2^77054544109 is an apocalyptic number.

It is an amenable number.

77054544109 is a deficient number, since it is larger than the sum of its proper divisors (1).

77054544109 is an equidigital number, since it uses as much as digits as its factorization.

77054544109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 705600, while the sum is 46.

The spelling of 77054544109 in words is "seventy-seven billion, fifty-four million, five hundred forty-four thousand, one hundred nine".