2553645563 has 4 divisors (see below), whose sum is σ = 2918452080. Its totient is φ = 2188839048.

The previous prime is 2553645473. The next prime is 2553645593. The reversal of 2553645563 is 3655463552.

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

It is a cyclic number.

It is not a de Polignac number, because 2553645563 - 2¹⁴ = 2553629179 is a prime.

It is a super-2 number, since 2×2553645563² = 13042211322859173938, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2553645593) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 182403248 + ... + 182403261.

It is an arithmetic number, because the mean of its divisors is an integer number (729613020).

Almost surely, 2^2553645563 is an apocalyptic number.

2553645563 is a deficient number, since it is larger than the sum of its proper divisors (364806517).

2553645563 is an equidigital number, since it uses as much as digits as its factorization.

2553645563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 364806516.

The product of its digits is 1620000, while the sum is 44.

The square root of 2553645563 is about 50533.6082523304. The cubic root of 2553645563 is about 1366.8479513701.

The spelling of 2553645563 in words is "two billion, five hundred fifty-three million, six hundred forty-five thousand, five hundred sixty-three".