2543131664 has 20 divisors (see below), whose sum is σ = 4952853756. Its totient is φ = 1264975872.

The previous prime is 2543131651. The next prime is 2543131681. The reversal of 2543131664 is 4661313452.

It can be written as a sum of positive squares in 2 ways, for example, as 1454659600 + 1088472064 = 38140^2 + 32992^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 408689 + ... + 414864.

Almost surely, 2^2543131664 is an apocalyptic number.

It is an amenable number.

2543131664 is a deficient number, since it is larger than the sum of its proper divisors (2409722092).

2543131664 is a wasteful number, since it uses less digits than its factorization.

2543131664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 823754 (or 823748 counting only the distinct ones).

The product of its digits is 51840, while the sum is 35.

The square root of 2543131664 is about 50429.4721764962. The cubic root of 2543131664 is about 1364.9695036279.

The spelling of 2543131664 in words is "two billion, five hundred forty-three million, one hundred thirty-one thousand, six hundred sixty-four".