2543434664 has 8 divisors (see below), whose sum is σ = 4768940010. Its totient is φ = 1271717328.

The previous prime is 2543434661. The next prime is 2543434703. The reversal of 2543434664 is 4664343452.

It can be written as a sum of positive squares in only one way, i.e., 1596641764 + 946792900 = 39958^2 + 30770^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (2543434661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 158964659 + ... + 158964674.

Almost surely, 2^2543434664 is an apocalyptic number.

It is an amenable number.

2543434664 is a deficient number, since it is larger than the sum of its proper divisors (2225505346).

2543434664 is a wasteful number, since it uses less digits than its factorization.

2543434664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 317929339 (or 317929335 counting only the distinct ones).

The product of its digits is 829440, while the sum is 41.

The square root of 2543434664 is about 50432.4762826495. The cubic root of 2543434664 is about 1365.0237109846.

The spelling of 2543434664 in words is "two billion, five hundred forty-three million, four hundred thirty-four thousand, six hundred sixty-four".