77635681339 has 2 divisors, whose sum is σ = 77635681340. Its totient is φ = 77635681338.

The previous prime is 77635681303. The next prime is 77635681399. The reversal of 77635681339 is 93318653677.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 77635681339 - 2¹³ = 77635673147 is a prime.

It is not a weakly prime, because it can be changed into another prime (77635681399) 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, 38817840669 + 38817840670.

It is an arithmetic number, because the mean of its divisors is an integer number (38817840670).

Almost surely, 2^77635681339 is an apocalyptic number.

77635681339 is a deficient number, since it is larger than the sum of its proper divisors (1).

77635681339 is an equidigital number, since it uses as much as digits as its factorization.

77635681339 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 17146080, while the sum is 58.

The spelling of 77635681339 in words is "seventy-seven billion, six hundred thirty-five million, six hundred eighty-one thousand, three hundred thirty-nine".