55777289569 has 2 divisors, whose sum is σ = 55777289570. Its totient is φ = 55777289568.

The previous prime is 55777289563. The next prime is 55777289593. The reversal of 55777289569 is 96598277755.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 33423152400 + 22354137169 = 182820^2 + 149513^2 .

It is a cyclic number.

It is not a de Polignac number, because 55777289569 - 2²⁵ = 55743735137 is a prime.

It is a super-2 number, since 2×55777289569² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 55777289498 and 55777289507.

It is not a weakly prime, because it can be changed into another prime (55777289563) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27888644784 + 27888644785.

It is an arithmetic number, because the mean of its divisors is an integer number (27888644785).

Almost surely, 2^55777289569 is an apocalyptic number.

It is an amenable number.

55777289569 is a deficient number, since it is larger than the sum of its proper divisors (1).

55777289569 is an equidigital number, since it uses as much as digits as its factorization.

55777289569 is an evil number, because the sum of its binary digits is even.

The product of its digits is 333396000, while the sum is 70.

The spelling of 55777289569 in words is "fifty-five billion, seven hundred seventy-seven million, two hundred eighty-nine thousand, five hundred sixty-nine".