77009990027 has 2 divisors, whose sum is σ = 77009990028. Its totient is φ = 77009990026.

The previous prime is 77009989963. The next prime is 77009990047. The reversal of 77009990027 is 72009990077.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 77009990027 - 2⁶ = 77009989963 is a prime.

It is not a weakly prime, because it can be changed into another prime (77009990047) 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, 38504995013 + 38504995014.

It is an arithmetic number, because the mean of its divisors is an integer number (38504995014).

Almost surely, 2^77009990027 is an apocalyptic number.

77009990027 is a deficient number, since it is larger than the sum of its proper divisors (1).

77009990027 is an equidigital number, since it uses as much as digits as its factorization.

77009990027 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 500094, while the sum is 50.

Adding to 77009990027 its sum of digits (50), we get a palindrome (77009990077).

The spelling of 77009990027 in words is "seventy-seven billion, nine million, nine hundred ninety thousand, twenty-seven".