2543734653 has 4 divisors (see below), whose sum is σ = 3391646208. Its totient is φ = 1695823100.

The previous prime is 2543734643. The next prime is 2543734691. The reversal of 2543734653 is 3564373452.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2543734653 - 2⁴ = 2543734637 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2543734603) 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, 423955773 + ... + 423955778.

It is an arithmetic number, because the mean of its divisors is an integer number (847911552).

Almost surely, 2^2543734653 is an apocalyptic number.

It is an amenable number.

2543734653 is a deficient number, since it is larger than the sum of its proper divisors (847911555).

2543734653 is an equidigital number, since it uses as much as digits as its factorization.

2543734653 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 847911554.

The product of its digits is 907200, while the sum is 42.

The square root of 2543734653 is about 50435.4503598411. The cubic root of 2543734653 is about 1365.0773754258.

The spelling of 2543734653 in words is "two billion, five hundred forty-three million, seven hundred thirty-four thousand, six hundred fifty-three".