2543566440 has 64 divisors (see below), whose sum is σ = 7644456000. Its totient is φ = 677061632.

The previous prime is 2543566429. The next prime is 2543566451. The reversal of 2543566440 is 446653452.

It is an interprime number because it is at equal distance from previous prime (2543566429) and next prime (2543566451).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 48736 + ... + 86384.

It is an arithmetic number, because the mean of its divisors is an integer number (119444625).

Almost surely, 2^2543566440 is an apocalyptic number.

2543566440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2543566440 is an abundant number, since it is smaller than the sum of its proper divisors (5100889560).

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

2543566440 is a wasteful number, since it uses less digits than its factorization.

2543566440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38226 (or 38222 counting only the distinct ones).

The product of its (nonzero) digits is 345600, while the sum is 39.

The square root of 2543566440 is about 50433.7827254708. The cubic root of 2543566440 is about 1365.0472846532.

The spelling of 2543566440 in words is "two billion, five hundred forty-three million, five hundred sixty-six thousand, four hundred forty".