2540664568 has 64 divisors (see below), whose sum is σ = 5222992320. Its totient is φ = 1151539200.

The previous prime is 2540664563. The next prime is 2540664631. The reversal of 2540664568 is 8654660452.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2540664563) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2487898 + ... + 2488918.

It is an arithmetic number, because the mean of its divisors is an integer number (81609255).

Almost surely, 2^2540664568 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2540664568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2611496160).

2540664568 is an abundant number, since it is smaller than the sum of its proper divisors (2682327752).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2540664568 is a wasteful number, since it uses less digits than its factorization.

2540664568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1448 (or 1444 counting only the distinct ones).

The product of its (nonzero) digits is 1382400, while the sum is 46.

The square root of 2540664568 is about 50405.0053863701. The cubic root of 2540664568 is about 1364.5279744719.

The spelling of 2540664568 in words is "two billion, five hundred forty million, six hundred sixty-four thousand, five hundred sixty-eight".