128477277679 has 2 divisors, whose sum is σ = 128477277680. Its totient is φ = 128477277678.

The previous prime is 128477277631. The next prime is 128477277697. The reversal of 128477277679 is 976772774821.

Together with next prime (128477277697) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is an emirp because it is prime and its reverse (976772774821) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 128477277679 - 2¹⁵ = 128477244911 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (128477277629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64238638839 + 64238638840.

It is an arithmetic number, because the mean of its divisors is an integer number (64238638840).

Almost surely, 2^128477277679 is an apocalyptic number.

128477277679 is a deficient number, since it is larger than the sum of its proper divisors (1).

128477277679 is an equidigital number, since it uses as much as digits as its factorization.

128477277679 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 116169984, while the sum is 67.

The spelling of 128477277679 in words is "one hundred twenty-eight billion, four hundred seventy-seven million, two hundred seventy-seven thousand, six hundred seventy-nine".