55555111169 has 2 divisors, whose sum is σ = 55555111170. Its totient is φ = 55555111168.

The previous prime is 55555111109. The next prime is 55555111207. The reversal of 55555111169 is 96111155555.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 55441411600 + 113699569 = 235460^2 + 10663^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55555111169 is a prime.

It is a super-2 number, since 2×55555111169² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (55555111109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27777555584 + 27777555585.

It is an arithmetic number, because the mean of its divisors is an integer number (27777555585).

Almost surely, 2^55555111169 is an apocalyptic number.

It is an amenable number.

55555111169 is a deficient number, since it is larger than the sum of its proper divisors (1).

55555111169 is an equidigital number, since it uses as much as digits as its factorization.

55555111169 is an evil number, because the sum of its binary digits is even.

The product of its digits is 168750, while the sum is 44.

The spelling of 55555111169 in words is "fifty-five billion, five hundred fifty-five million, one hundred eleven thousand, one hundred sixty-nine".