55617062209 has 2 divisors, whose sum is σ = 55617062210. Its totient is φ = 55617062208.

The previous prime is 55617062167. The next prime is 55617062227. The reversal of 55617062209 is 90226071655.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 41931571984 + 13685490225 = 204772^2 + 116985^2 .

It is a cyclic number.

It is not a de Polignac number, because 55617062209 - 2⁹ = 55617061697 is a prime.

It is not a weakly prime, because it can be changed into another prime (55617062009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27808531104 + 27808531105.

It is an arithmetic number, because the mean of its divisors is an integer number (27808531105).

Almost surely, 2^55617062209 is an apocalyptic number.

It is an amenable number.

55617062209 is a deficient number, since it is larger than the sum of its proper divisors (1).

55617062209 is an equidigital number, since it uses as much as digits as its factorization.

55617062209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 226800, while the sum is 43.

The spelling of 55617062209 in words is "fifty-five billion, six hundred seventeen million, sixty-two thousand, two hundred nine".