2556546643 has 8 divisors (see below), whose sum is σ = 2950696800. Its totient is φ = 2169628800.

The previous prime is 2556546631. The next prime is 2556546673. The reversal of 2556546643 is 3466456552.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2556546643 - 2¹³ = 2556538451 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2556546593 and 2556546602.

It is not an unprimeable number, because it can be changed into a prime (2556546673) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1807318 + ... + 1808731.

It is an arithmetic number, because the mean of its divisors is an integer number (368837100).

Almost surely, 2^2556546643 is an apocalyptic number.

2556546643 is a deficient number, since it is larger than the sum of its proper divisors (394150157).

2556546643 is a wasteful number, since it uses less digits than its factorization.

2556546643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3616157.

The product of its digits is 2592000, while the sum is 46.

The square root of 2556546643 is about 50562.3045657533. The cubic root of 2556546643 is about 1367.3653599783.

Subtracting 2556546643 from its reverse (3466456552), we obtain a palindrome (909909909).

The spelling of 2556546643 in words is "two billion, five hundred fifty-six million, five hundred forty-six thousand, six hundred forty-three".