277777888888897 has 2 divisors, whose sum is σ = 277777888888898. Its totient is φ = 277777888888896.

The previous prime is 277777888888883. The next prime is 277777888888901. The reversal of 277777888888897 is 798888888777772.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 255481350958656 + 22296537930241 = 15983784^2 + 4721921^2 .

It is a cyclic number.

It is not a de Polignac number, because 277777888888897 - 2¹⁹ = 277777888364609 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 277777888888793 and 277777888888802.

It is not a weakly prime, because it can be changed into another prime (277777888838897) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 138888944444448 + 138888944444449.

It is an arithmetic number, because the mean of its divisors is an integer number (138888944444449).

Almost surely, 2^{277777888888897} is an apocalyptic number.

It is an amenable number.

277777888888897 is a deficient number, since it is larger than the sum of its proper divisors (1).

277777888888897 is an equidigital number, since it uses as much as digits as its factorization.

277777888888897 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4441101041664, while the sum is 109.

The spelling of 277777888888897 in words is "two hundred seventy-seven trillion, seven hundred seventy-seven billion, eight hundred eighty-eight million, eight hundred eighty-eight thousand, eight hundred ninety-seven".