77964236827 has 2 divisors, whose sum is σ = 77964236828. Its totient is φ = 77964236826.

The previous prime is 77964236797. The next prime is 77964236893. The reversal of 77964236827 is 72863246977.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 77964236827 - 2¹¹ = 77964234779 is a prime.

It is not a weakly prime, because it can be changed into another prime (77964236327) 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, 38982118413 + 38982118414.

It is an arithmetic number, because the mean of its divisors is an integer number (38982118414).

Almost surely, 2^77964236827 is an apocalyptic number.

77964236827 is a deficient number, since it is larger than the sum of its proper divisors (1).

77964236827 is an equidigital number, since it uses as much as digits as its factorization.

77964236827 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 42674688, while the sum is 61.

The spelling of 77964236827 in words is "seventy-seven billion, nine hundred sixty-four million, two hundred thirty-six thousand, eight hundred twenty-seven".