2556858063 has 16 divisors (see below), whose sum is σ = 3594310400. Its totient is φ = 1612275840.

The previous prime is 2556858061. The next prime is 2556858071. The reversal of 2556858063 is 3608586552.

It is not a de Polignac number, because 2556858063 - 2¹ = 2556858061 is a prime.

It is a super-2 number, since 2×2556858063² = 13075046308656223938, which contains 22 as substring.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2556858061) 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 15 ways as a sum of consecutive naturals, for example, 423 + ... + 71511.

It is an arithmetic number, because the mean of its divisors is an integer number (224644400).

Almost surely, 2^2556858063 is an apocalyptic number.

2556858063 is a deficient number, since it is larger than the sum of its proper divisors (1037452337).

2556858063 is a wasteful number, since it uses less digits than its factorization.

2556858063 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71742.

The product of its (nonzero) digits is 1728000, while the sum is 48.

The square root of 2556858063 is about 50565.3840388857. The cubic root of 2556858063 is about 1367.4208785730.

The spelling of 2556858063 in words is "two billion, five hundred fifty-six million, eight hundred fifty-eight thousand, sixty-three".