2556561127 has 2 divisors, whose sum is σ = 2556561128. Its totient is φ = 2556561126.

The previous prime is 2556560987. The next prime is 2556561157. The reversal of 2556561127 is 7211656552.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2556561127 - 2¹⁹ = 2556036839 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2556561127.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2556561157) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1278280563 + 1278280564.

It is an arithmetic number, because the mean of its divisors is an integer number (1278280564).

Almost surely, 2^2556561127 is an apocalyptic number.

2556561127 is a deficient number, since it is larger than the sum of its proper divisors (1).

2556561127 is an equidigital number, since it uses as much as digits as its factorization.

2556561127 is an evil number, because the sum of its binary digits is even.

The product of its digits is 126000, while the sum is 40.

The square root of 2556561127 is about 50562.4477947815. The cubic root of 2556561127 is about 1367.3679422224.

The spelling of 2556561127 in words is "two billion, five hundred fifty-six million, five hundred sixty-one thousand, one hundred twenty-seven".