47765566556777 has 2 divisors, whose sum is σ = 47765566556778. Its totient is φ = 47765566556776.

The previous prime is 47765566556731. The next prime is 47765566556801. The reversal of 47765566556777 is 77765566556774.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 47702007608896 + 63558947881 = 6906664^2 + 252109^2 .

It is a cyclic number.

It is not a de Polignac number, because 47765566556777 - 2⁴² = 43367520045673 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 47765566556695 and 47765566556704.

It is not a weakly prime, because it can be changed into another prime (47765566556377) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23882783278388 + 23882783278389.

It is an arithmetic number, because the mean of its divisors is an integer number (23882783278389).

Almost surely, 2^{47765566556777} is an apocalyptic number.

It is an amenable number.

47765566556777 is a deficient number, since it is larger than the sum of its proper divisors (1).

47765566556777 is an equidigital number, since it uses as much as digits as its factorization.

47765566556777 is an evil number, because the sum of its binary digits is even.

The product of its digits is 54454680000, while the sum is 83.

The spelling of 47765566556777 in words is "forty-seven trillion, seven hundred sixty-five billion, five hundred sixty-six million, five hundred fifty-six thousand, seven hundred seventy-seven".