55321028755777 has 2 divisors, whose sum is σ = 55321028755778. Its totient is φ = 55321028755776.

The previous prime is 55321028755763. The next prime is 55321028755787. The reversal of 55321028755777 is 77755782012355.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 38074317452721 + 17246711303056 = 6170439^2 + 4152916^2 .

It is a cyclic number.

It is not a de Polignac number, because 55321028755777 - 2¹¹ = 55321028753729 is a prime.

It is not a weakly prime, because it can be changed into another prime (55321028755787) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27660514377888 + 27660514377889.

It is an arithmetic number, because the mean of its divisors is an integer number (27660514377889).

Almost surely, 2^{55321028755777} is an apocalyptic number.

It is an amenable number.

55321028755777 is a deficient number, since it is larger than the sum of its proper divisors (1).

55321028755777 is an equidigital number, since it uses as much as digits as its factorization.

55321028755777 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144060000, while the sum is 64.

The spelling of 55321028755777 in words is "fifty-five trillion, three hundred twenty-one billion, twenty-eight million, seven hundred fifty-five thousand, seven hundred seventy-seven".