55555017797 has 2 divisors, whose sum is σ = 55555017798. Its totient is φ = 55555017796.

The previous prime is 55555017737. The next prime is 55555017829. The reversal of 55555017797 is 79771055555.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 37171454401 + 18383563396 = 192799^2 + 135586^2 .

It is a cyclic number.

It is not a de Polignac number, because 55555017797 - 2⁶ = 55555017733 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55555017737) 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, 27777508898 + 27777508899.

It is an arithmetic number, because the mean of its divisors is an integer number (27777508899).

Almost surely, 2^55555017797 is an apocalyptic number.

It is an amenable number.

55555017797 is a deficient number, since it is larger than the sum of its proper divisors (1).

55555017797 is an equidigital number, since it uses as much as digits as its factorization.

55555017797 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9646875, while the sum is 56.

The spelling of 55555017797 in words is "fifty-five billion, five hundred fifty-five million, seventeen thousand, seven hundred ninety-seven".