55645223369 has 2 divisors, whose sum is σ = 55645223370. Its totient is φ = 55645223368.

The previous prime is 55645223357. The next prime is 55645223383. The reversal of 55645223369 is 96332254655.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 42691824400 + 12953398969 = 206620^2 + 113813^2 .

It is a cyclic number.

It is not a de Polignac number, because 55645223369 - 2¹⁶ = 55645157833 is a prime.

It is a super-2 number, since 2×55645223369² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (55645223339) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27822611684 + 27822611685.

It is an arithmetic number, because the mean of its divisors is an integer number (27822611685).

Almost surely, 2^55645223369 is an apocalyptic number.

It is an amenable number.

55645223369 is a deficient number, since it is larger than the sum of its proper divisors (1).

55645223369 is an equidigital number, since it uses as much as digits as its factorization.

55645223369 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5832000, while the sum is 50.

The spelling of 55645223369 in words is "fifty-five billion, six hundred forty-five million, two hundred twenty-three thousand, three hundred sixty-nine".