2543653793 has 4 divisors (see below), whose sum is σ = 2549696148. Its totient is φ = 2537611440.

The previous prime is 2543653787. The next prime is 2543653811. The reversal of 2543653793 is 3973563452.

It is a happy number.

2543653793 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 1346009344 + 1197644449 = 36688^2 + 34607^2 .

It is a cyclic number.

It is not a de Polignac number, because 2543653793 - 2²⁰ = 2542605217 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2543653703) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3020546 + ... + 3021387.

It is an arithmetic number, because the mean of its divisors is an integer number (637424037).

Almost surely, 2^2543653793 is an apocalyptic number.

It is an amenable number.

2543653793 is a deficient number, since it is larger than the sum of its proper divisors (6042355).

2543653793 is an equidigital number, since it uses as much as digits as its factorization.

2543653793 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6042354.

The product of its digits is 2041200, while the sum is 47.

The square root of 2543653793 is about 50434.6487347736. The cubic root of 2543653793 is about 1365.0629109550.

The spelling of 2543653793 in words is "two billion, five hundred forty-three million, six hundred fifty-three thousand, seven hundred ninety-three".