2543321644 has 6 divisors (see below), whose sum is σ = 4450812884. Its totient is φ = 1271660820.

The previous prime is 2543321611. The next prime is 2543321647. The reversal of 2543321644 is 4461233452.

It is not an unprimeable number, because it can be changed into a prime (2543321647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 317915202 + ... + 317915209.

Almost surely, 2^2543321644 is an apocalyptic number.

It is an amenable number.

2543321644 is a deficient number, since it is larger than the sum of its proper divisors (1907491240).

2543321644 is a wasteful number, since it uses less digits than its factorization.

2543321644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 635830415 (or 635830413 counting only the distinct ones).

The product of its digits is 69120, while the sum is 34.

The square root of 2543321644 is about 50431.3557620653. The cubic root of 2543321644 is about 1365.0034919651.

The spelling of 2543321644 in words is "two billion, five hundred forty-three million, three hundred twenty-one thousand, six hundred forty-four".