2556545568 has 48 divisors (see below), whose sum is σ = 6715820160. Its totient is φ = 851561216.

The previous prime is 2556545567. The next prime is 2556545569. The reversal of 2556545568 is 8655456552.

It is an interprime number because it is at equal distance from previous prime (2556545567) and next prime (2556545569).

It is a tau number, because it is divible by the number of its divisors (48).

It is a hoax number, since the sum of its digits (51) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 2556545568.

It is not an unprimeable number, because it can be changed into a prime (2556545567) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 133798 + ... + 151706.

It is an arithmetic number, because the mean of its divisors is an integer number (139912920).

Almost surely, 2^2556545568 is an apocalyptic number.

It is an amenable number.

2556545568 is an abundant number, since it is smaller than the sum of its proper divisors (4159274592).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2556545568 is a wasteful number, since it uses less digits than its factorization.

2556545568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19409 (or 19401 counting only the distinct ones).

The product of its digits is 7200000, while the sum is 51.

The square root of 2556545568 is about 50562.2939353032. The cubic root of 2556545568 is about 1367.3651683242.

The spelling of 2556545568 in words is "two billion, five hundred fifty-six million, five hundred forty-five thousand, five hundred sixty-eight".