55726128169 has 2 divisors, whose sum is σ = 55726128170. Its totient is φ = 55726128168.

The previous prime is 55726128079. The next prime is 55726128221. The reversal of 55726128169 is 96182162755.

It is a happy number.

55726128169 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an a-pointer prime, because the next prime (55726128221) can be obtained adding 55726128169 to its sum of digits (52).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 45491770944 + 10234357225 = 213288^2 + 101165^2 .

It is a cyclic number.

It is not a de Polignac number, because 55726128169 - 2⁹ = 55726127657 is a prime.

It is a super-2 number, since 2×55726128169² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (55726128569) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27863064084 + 27863064085.

It is an arithmetic number, because the mean of its divisors is an integer number (27863064085).

Almost surely, 2^55726128169 is an apocalyptic number.

It is an amenable number.

55726128169 is a deficient number, since it is larger than the sum of its proper divisors (1).

55726128169 is an equidigital number, since it uses as much as digits as its factorization.

55726128169 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1814400, while the sum is 52.

The spelling of 55726128169 in words is "fifty-five billion, seven hundred twenty-six million, one hundred twenty-eight thousand, one hundred sixty-nine".