55563318329 has 2 divisors, whose sum is σ = 55563318330. Its totient is φ = 55563318328.

The previous prime is 55563318319. The next prime is 55563318337. The reversal of 55563318329 is 92381336555.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 54121369600 + 1441948729 = 232640^2 + 37973^2 .

It is a cyclic number.

It is not a de Polignac number, because 55563318329 - 2¹⁶ = 55563252793 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (55563318319) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27781659164 + 27781659165.

It is an arithmetic number, because the mean of its divisors is an integer number (27781659165).

Almost surely, 2^55563318329 is an apocalyptic number.

It is an amenable number.

55563318329 is a deficient number, since it is larger than the sum of its proper divisors (1).

55563318329 is an equidigital number, since it uses as much as digits as its factorization.

55563318329 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2916000, while the sum is 50.

The spelling of 55563318329 in words is "fifty-five billion, five hundred sixty-three million, three hundred eighteen thousand, three hundred twenty-nine".