2556775871 has 32 divisors (see below), whose sum is σ = 2901330432. Its totient is φ = 2236999680.

The previous prime is 2556775861. The next prime is 2556775883. The reversal of 2556775871 is 1785776552.

It is not a de Polignac number, because 2556775871 - 2¹⁸ = 2556513727 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2556775861) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6854441 + ... + 6854813.

It is an arithmetic number, because the mean of its divisors is an integer number (90666576).

Almost surely, 2^2556775871 is an apocalyptic number.

2556775871 is a deficient number, since it is larger than the sum of its proper divisors (344554561).

2556775871 is a wasteful number, since it uses less digits than its factorization.

2556775871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 723.

The product of its digits is 4116000, while the sum is 53.

The square root of 2556775871 is about 50564.5713024446. The cubic root of 2556775871 is about 1367.4062261809.

The spelling of 2556775871 in words is "two billion, five hundred fifty-six million, seven hundred seventy-five thousand, eight hundred seventy-one".