6556251271 has 2 divisors, whose sum is σ = 6556251272. Its totient is φ = 6556251270.

The previous prime is 6556251259. The next prime is 6556251307. The reversal of 6556251271 is 1721526556.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6556251271 - 2²¹ = 6554154119 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6556251071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3278125635 + 3278125636.

It is an arithmetic number, because the mean of its divisors is an integer number (3278125636).

Almost surely, 2^6556251271 is an apocalyptic number.

6556251271 is a deficient number, since it is larger than the sum of its proper divisors (1).

6556251271 is an equidigital number, since it uses as much as digits as its factorization.

6556251271 is an odious number, because the sum of its binary digits is odd.

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

The square root of 6556251271 is about 80970.6815520284. The cubic root of 6556251271 is about 1871.6236740141.

The spelling of 6556251271 in words is "six billion, five hundred fifty-six million, two hundred fifty-one thousand, two hundred seventy-one".