9772818553 has 2 divisors, whose sum is σ = 9772818554. Its totient is φ = 9772818552.

The previous prime is 9772818551. The next prime is 9772818563. The reversal of 9772818553 is 3558182779.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6385927744 + 3386890809 = 79912^2 + 58197^2 .

It is a cyclic number.

It is not a de Polignac number, because 9772818553 - 2¹ = 9772818551 is a prime.

It is a super-2 number, since 2×9772818553² (a number of 21 digits) contains 22 as substring.

Together with 9772818551, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 9772818494 and 9772818503.

It is not a weakly prime, because it can be changed into another prime (9772818551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4886409276 + 4886409277.

It is an arithmetic number, because the mean of its divisors is an integer number (4886409277).

Almost surely, 2^9772818553 is an apocalyptic number.

It is an amenable number.

9772818553 is a deficient number, since it is larger than the sum of its proper divisors (1).

9772818553 is an equidigital number, since it uses as much as digits as its factorization.

9772818553 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4233600, while the sum is 55.

The square root of 9772818553 is about 98857.5669991933. The cubic root of 9772818553 is about 2137.9946387751.

It can be divided in two parts, 97728 and 18553, that added together give a square (116281 = 341²).

The spelling of 9772818553 in words is "nine billion, seven hundred seventy-two million, eight hundred eighteen thousand, five hundred fifty-three".