2640543530 has 32 divisors (see below), whose sum is σ = 5078771280. Its totient is φ = 984960000.

The previous prime is 2640543523. The next prime is 2640543559. The reversal of 2640543530 is 353450462.

It can be written as a sum of positive squares in 8 ways, for example, as 1560961081 + 1079582449 = 39509^2 + 32857^2 .

It is a super-3 number, since 3×2640543530³ (a number of 29 digits) contains 333 as substring.

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, 52721 + ... + 89780.

Almost surely, 2^2640543530 is an apocalyptic number.

2640543530 is a deficient number, since it is larger than the sum of its proper divisors (2438227750).

2640543530 is a wasteful number, since it uses less digits than its factorization.

2640543530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142634.

The product of its (nonzero) digits is 43200, while the sum is 32.

The square root of 2640543530 is about 51386.2192615880. The cubic root of 2640543530 is about 1382.1794885427.

Adding to 2640543530 its reverse (353450462), we get a palindrome (2993993992).

The spelling of 2640543530 in words is "two billion, six hundred forty million, five hundred forty-three thousand, five hundred thirty".