2540646566 has 16 divisors (see below), whose sum is σ = 4095374256. Its totient is φ = 1177752576.

The previous prime is 2540646527. The next prime is 2540646593. The reversal of 2540646566 is 6656460452.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 555371 + ... + 559926.

It is an arithmetic number, because the mean of its divisors is an integer number (255960891).

Almost surely, 2^2540646566 is an apocalyptic number.

2540646566 is a deficient number, since it is larger than the sum of its proper divisors (1554727690).

2540646566 is a wasteful number, since it uses less digits than its factorization.

2540646566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1115383.

The product of its (nonzero) digits is 1036800, while the sum is 44.

The square root of 2540646566 is about 50404.8268125187. The cubic root of 2540646566 is about 1364.5247516549.

The spelling of 2540646566 in words is "two billion, five hundred forty million, six hundred forty-six thousand, five hundred sixty-six".