2556573551 has 8 divisors (see below), whose sum is σ = 2931772704. Its totient is φ = 2183868000.

The previous prime is 2556573541. The next prime is 2556573563. The reversal of 2556573551 is 1553756552.

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 2556573551 - 2¹⁴ = 2556557167 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2556573521) by changing a digit.

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, 621200 + ... + 625301.

It is an arithmetic number, because the mean of its divisors is an integer number (366471588).

Almost surely, 2^2556573551 is an apocalyptic number.

2556573551 is a deficient number, since it is larger than the sum of its proper divisors (375199153).

2556573551 is a wasteful number, since it uses less digits than its factorization.

2556573551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1246801.

The product of its digits is 787500, while the sum is 44.

The square root of 2556573551 is about 50562.5706526082. The cubic root of 2556573551 is about 1367.3701571967.

The spelling of 2556573551 in words is "two billion, five hundred fifty-six million, five hundred seventy-three thousand, five hundred fifty-one".