2543004555656 has 16 divisors (see below), whose sum is σ = 4932551940300. Its totient is φ = 1227657371584.

The previous prime is 2543004555631. The next prime is 2543004555661. The reversal of 2543004555656 is 6565554003452.

It can be written as a sum of positive squares in 2 ways, for example, as 2294213091556 + 248791464100 = 1514666^2 + 498790^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5480613035 + ... + 5480613498.

Almost surely, 2^{2543004555656} is an apocalyptic number.

It is an amenable number.

2543004555656 is a deficient number, since it is larger than the sum of its proper divisors (2389547384644).

2543004555656 is a wasteful number, since it uses less digits than its factorization.

2543004555656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10961226568 (or 10961226564 counting only the distinct ones).

The product of its (nonzero) digits is 10800000, while the sum is 50.

The spelling of 2543004555656 in words is "two trillion, five hundred forty-three billion, four million, five hundred fifty-five thousand, six hundred fifty-six".