2556560653 has 8 divisors (see below), whose sum is σ = 2670278976. Its totient is φ = 2443056000.

The previous prime is 2556560641. The next prime is 2556560681. The reversal of 2556560653 is 3560656552.

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 2556560653 - 2²¹ = 2554463501 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2556564653) 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, 28708 + ... + 77053.

It is an arithmetic number, because the mean of its divisors is an integer number (333784872).

Almost surely, 2^2556560653 is an apocalyptic number.

2556560653 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

2556560653 is a deficient number, since it is larger than the sum of its proper divisors (113718323).

2556560653 is a wasteful number, since it uses less digits than its factorization.

2556560653 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106835.

The product of its (nonzero) digits is 810000, while the sum is 43.

The square root of 2556560653 is about 50562.4431075082. The cubic root of 2556560653 is about 1367.3678577166.

It can be divided in two parts, 255656065 and 3, that multiplied together give a triangular number (766968195 = T₃₉₁₆₅).

The spelling of 2556560653 in words is "two billion, five hundred fifty-six million, five hundred sixty thousand, six hundred fifty-three".