2561743012648 has 32 divisors (see below), whose sum is σ = 4845005107200. Its totient is φ = 1269757968192.

The previous prime is 2561743012567. The next prime is 2561743012651. The reversal of 2561743012648 is 8462103471652.

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, 237633 + ... + 2275951.

It is an arithmetic number, because the mean of its divisors is an integer number (151406409600).

Almost surely, 2^{2561743012648} is an apocalyptic number.

It is an amenable number.

2561743012648 is a deficient number, since it is larger than the sum of its proper divisors (2283262094552).

2561743012648 is a wasteful number, since it uses less digits than its factorization.

2561743012648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2039689 (or 2039685 counting only the distinct ones).

The product of its (nonzero) digits is 1935360, while the sum is 49.

The spelling of 2561743012648 in words is "two trillion, five hundred sixty-one billion, seven hundred forty-three million, twelve thousand, six hundred forty-eight".