2553165445 has 4 divisors (see below), whose sum is σ = 3063798540. Its totient is φ = 2042532352.

The previous prime is 2553165389. The next prime is 2553165457. The reversal of 2553165445 is 5445613552.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 833072769 + 1720092676 = 28863^2 + 41474^2 .

It is a cyclic number.

It is not a de Polignac number, because 2553165445 - 2⁷ = 2553165317 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 2553165398 and 2553165407.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 255316540 + ... + 255316549.

It is an arithmetic number, because the mean of its divisors is an integer number (765949635).

Almost surely, 2^2553165445 is an apocalyptic number.

It is an amenable number.

2553165445 is a deficient number, since it is larger than the sum of its proper divisors (510633095).

2553165445 is an equidigital number, since it uses as much as digits as its factorization.

2553165445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 510633094.

The product of its digits is 360000, while the sum is 40.

The square root of 2553165445 is about 50528.8575469503. The cubic root of 2553165445 is about 1366.7622843736.

Adding to 2553165445 its reverse (5445613552), we get a palindrome (7998778997).

The spelling of 2553165445 in words is "two billion, five hundred fifty-three million, one hundred sixty-five thousand, four hundred forty-five".